Behind the scenes of the voice. But first the nightline 5. Hey, amanda. Sorry to bother you but ive got to take a sick day. Moms dont take sick days, moms take dayquil severe. The nondroutsy coughing, aching, fever, sore throat, stuffy head, no sick days medicine. Its our biggest sale at jcpenney. The entire stores on sale. Get 10 off when you spend 25 or more with coupon. Plus get amazing big buys on sweaters for her and boots and shoe for her. Jcpenney. When it fits you feel it. Number one in 60 seconds. Good evening. Tonight a very personal look at what its like to be an egg donor. To some it may seem like easy money but the process is invasive. Risky. And raises ethical questions when socalled premier candidates can command up to six figures for their donation. Abcs Abbie Boudreau brings us inside the competitive, sometimes lucrative marketplace. Going to have my 11day ultrasound. Reporter 33yearold Wendy Gerrish has been here just about every day for the past week. Lets look at the right ovary first. The blacks are the follicles. Reporter wendy is not pregnant. Shes donating her eggs for 20,000. Donor eggs are in high demand. Allowing attractive, intelligent women like wendy to command big fees for their desirable genes. This looks fantastic. Yay, good job, ovaries. Reporter shes a tall brunette acupuncturist with a graduate degree. This is her seventh donation. Whats it like to have your eggs in such high demand . Pretty awesome. I feel pretty valuable. Okay. Im a good procreator. Reporter she has 11 biological children all over the world. One is her own. What inspired you to want to do this . My way of being rewarded is to give. One day i just decided, like, yeah. I want to do that. I want to help a family have children. Theres wendy. Oh, there she is. Theres lovely wendy. That was the first picture of saw of her. And i thought, oh, she looks so wonderful. Reporter Shelley Smith runs a Los Angelesbased egg agency called the egg donor program. Where she pairs hopeful parents desperate to have children with beautiful, Accomplished Women like wendy. Willing to help them have the baby of their dreams for a price. This is my harvard grad right here. Reporter theres a careful screening process. Only 5 make the cut. The premier donors get a little bit higher fee and its usually based on higher education, great s. A. T. Scores. Invariably when we put up a really beautiful donor whos also smart and has other qualities, we get calls immediately. I call it the feeding frenzy. Is she pretty smart . Uhhuh. Reporter its a lucrative, competitive industry. Some donors commanding as much as 50,000 for their eggs, sparking controversy over how much is too much. The highest fee that any of our donors have gotten was six figures from a family meaning . 100, 200 . 100,000. That goes straight to the donor . Straight to the donor. Reporter ethical guidelines set by the American Society for reproductive medicine say compensating a donor more than 10,000 is not appropriate. Fertility specialist dr. Eric widra agrees. We worry that theyre exposing themselves to risk just because the price is right. And we worry that that creates additional incentives to maybe be untruthful about their history or unrealistic about the expectations of going through treatment. Reporter shelleys agency and many like hers have their reasons for not following the guidelines. Why not have a cap . Doctors dont have a cap. Agencies certainly make money at it. Why do the donors have to have a certain amount thats right for them to get paid when nobody else has any kind of cap . What do you say to critics who think this is borderline unethical, that this is all about designer babies . I dont think these are designer babies. If you think about it, when you pick someone to marry, youre picking the genetics for your child as well. Why cant you kind of look for those qualities in an egg donor whos going to help you build your family . Im going to do my two injections tonight. Reporter for the wellcompensated donors there is a physical price. Donating eggs can be a long, painful, risky process. Sometimes it feels like i need five hands to do all this. Reporter during the next 15 days, wendy will take a cocktail of medications designed to boost the number of eggs that the doctor can extract at one time. What do you say to people who think, youre not really donating eggs, youre selling your eggs . Youre dedicating months of your time, sacrificing part of yourself, your body. Its work. This is one of the things that i always get with the fertility medications is migraine headaches. Getting pretty bad right now. Reporter wendy visits her doctor almost daily to ensure she doesnt have a bad reaction to the medication. Day eight of my medications at this point in the process, you really start to feel your ovaries. Theyre growing. I mean, at least two, three, four times their size. Reporter when the day comes to have her eggs removed, shes put under general anesthesia. Theres always that little bit of risk. Just a few more minutes. Beautiful, jody. Success. Reporter this difficult process can be a lifeline, giving many women their only shot at getting pregnant. Michelle bader got married at 43 and immediately started trying for a family. Im thinking, im getting pregnant on my honeymoon. Like, lets do this. Of course. Thats what happens. You didnt . Did not. And i didnt the month after. Or the month after. Reporter she visited multiple fertility doctors and tried ivf with her own eggs. But still wasnt able to conceive. Emotionally at that point, what was it like . I lost a lot of tears. I was depressed. I turned inward. Reporter michelle didnt realize that getting pregnant at her age would be so hard. By age 40, some women only have a 2 to 5 chance of having a baby naturally. The media doesnt tell you. The actors or actresses that have their kids later in life, they dont tell you that they had donor eggs. So i guess you see it and its around you and you think, if they can, i can. At what point did you realize that having an egg donor was going to be your solution . I went to everyone and did everything that somebody recommended in order to help me get a baby. I did it all. And at some point youre just like i want a baby more than i want my own dna. I want to be a mom. And thats when you say, i think i need to do the donor route. Reporter michelle says once she accepted it, the process of finding a donor consumed her. And then all of a sudden id be like looking on the street going, she could be my egg donor. She could be my egg donor. She looks like me, shes 20. What were some of the things you were looking for in a donor . I wanted somebody that was similar to me. Medical history was important to me too. Reporter after scouring agencies for different donors, she says she found the right match at an agency in beverly hills. Its like i was dating online. I said, lets try all of these places and lets see what we get. And really early on i saw a girl that spoke to me. Like she just had these angelic, beautiful features. And im like, thats her. Reporter michelle finally got pregnant. She says she paid 7,000 to the donor and another 7,500 to the agency who matched them. Adding in the doctor and legal fees, she says she paid more than 20,000. Was it worth it . For sure. Every cent. You dont think about all that anymore. Reporter michelle gave birth to twins, rosie and asher, thanks to that egg donor, at the age of 45. The moment the nurse brings the babies over to you and you hold them in your arms for that first time, whats that like . Im a mom. Im finally a mom. Like, it happened. I am going to say, thats my son. Thats my daughter. Somebody is going to call me mom. Do you like them when theyre cooked or raw like this . Raw like that. Reporter michelle doesnt want to fuel the misconceptions about conceiving children later in life. People say to me, oh, you were 46 when you had these kids . Id be like, yeah, i had egg donor. I feel like i have to justify it in some way. Or explain it to them. What are you cleaning . Clean the house. If i could help somebody out their story or be comfortable with their situation then i want to help that. It doesnt need to be taboo. How grateful are you for this egg donor . She for sure is my angel. She made it possible. These girls that do this, they made it possible for our dreams to be reality. Reporter for nightline, im Abbie Boudreau in los angeles. Up next, stop thief Serena Williams was almost the victim of a crime until she took matters into her own hands. And new couple alert, Blake Shelton and gwen stefani. Shelton and given stefani. Welcome to the most social car weve ever designed. 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Reporter shes one of the greatest athletes the world has ever known. Game, set, match Serena Williams. Reporter but this week Serena Williams had to flex some different muscles. The 34yearold superstar not chasing after tennis balls, chasing after an alleged cell phone thief. Take a look at this surveillance video. You see the 21time grand slam champ sitting down to dinner tuesday at mission chinese, a trendy starstudded restaurant in san francisco. Her phone is sitting out on the chair next to her. Now check out the man leaning against the counter. Youre in a restaurant, youre having fun, not paying attention to your surroundings. Thats what these guys are looking for. Reporter acting casually he appears to swipe her phone off the chair and take off. The tennis star reacts almost immediately. She leaps up, chases after the alleged thief, quickly catches up, and confronts him outside. Once i reached the door i saw that she had she was talking to the guy. Reporter serena reportedly asked the man if he mistakenly took the wrong phone. She says he hesitates then sheepishly admits he did because it was so confusing in the restaurant. She said she thought that was the best approach so that she could avoid any conflict with him. And i just said, good job. Reporter for Serena Williams, her runin with a suspected thief was a moment of triumph. Williams recounting the whole incident on facebook leaving her followers with some advice. Always listen to your superhero inner voice. Just because youre a lady, dont be afraid to step up to any challenge and not be a victim but a hero. The superstar posting this photo of herself wearing that classic s. It was maybe a bit of payback for the 2 million americans who had their phones stolen last year. Its been dubbed apple picking. Thieves walking away with peoples phones by any means necessary. Of course celebrities like williams may have more at stake, according to former new york cop joe giacalone. They want a celebritys phone . Something like that with all the information . What people put on their cell phones, photographs, videos, some of them inappropriate. So these are things that theyre making big money on. So that could always be an impetus to do this kind of stuff. Reporter its not just celebrities playing crime stopper. Apparently chasing after suspected thieves may be in our dna. Watch this alleged thief grab a cell phone from an unsuspecting pedestrian in new york city. Without missing a beat the woman chases after him, followed by a man riding on a city bike. In fact, abcs what would you do hired actors to play thieves at a coffee shop going for a strangers laptop. Excuse me, sorry to bother you. Thats all right. Im just working on my laptop, ive got to run outside. Look after it for me . That would be awesome. Thank you so much. Thank you. Reporter several times during the course of the day normal people in everyday normal situations going after the suspected property thieves. Excuse me excuse me excuse me hey thats not yours. No. He asked us to watch the computer. Thats my friend, he told me to grab it. Can i just make sure . He asked us are you kidding me . No, im not kidding you. I wasnt letting him walk away with that computer, wasnt happening. Not on my watch. Reporter of course, these situations like williams went off without a hitch. But encounters with cell phone thieves arent always civil. Giacalone says advances in technology are now making it less necessary to chase people down. I dont understand the idea behind why criminals want these the way they can be traced, kill switches for cell phones. All these other types of thins. You know, listen. The more of these guys get arrested youre going to start seeing a lot less of these types of crimes. Reporter which begs the question, is chasing after a thief necessarily a good idea . When it comes to your property, its not worth your life. It can always be replaced. And listen. The idea behind this whole thing is to make sure you enjoy yourself but also make it so you keep yourself safe. Reporter what can you do to keep your belongings safe . First thing everybody has to be mindful of their surroundings. Youre at a bar, a restaurant, out on the street, wherever it may be, things can change in a second. Try to avoid distractions. Like burying your head in your cell phone. Dont carry checkbooks, dont carry Social Security cards or any other identifying things. Reporter the moral of this story for bebe thieves, if youre going to steal a phone, maybe just maybe it shouldnt belong to Serena Williams. I think that she was very brave. She could set like an example for people. When you first saw that video and you first saw her reaction, what did you think . Shes a sports athlete, shes in great shape. But you know what, you dont know who youre going up against or what youre dealing with. Reporter for nightline im t. J. Holmes in new york. Up next, newly single Blake Shelton and gwen stefani confirming their relationship. Watching football together is great. But i think women would agree. Huddling with their man after the game is nice too. The thing is, about half of men over 40 have some degree of erectile dysfunction. Well, viagra helps guys with ed get and keep an erection. Ask your doctor if your heart is healthy enough for sex. Do not take viagra if you take nitrates for chest pain; it may cause an unsafe drop in blood pressure. Side effects include headache, flushing, upset stomach and abnormal vision. To avoid longterm injury, seek immediate medical help for an erection lasting more than four hours. Stop taking viagra and call your doctor right away if you experience a sudden decrease or loss in vision or hearing. Ask your doctor about viagra. Now available in new single packs. Welcome to the most social car weve ever designed. The 2015 nissan murano. Recipient of autopacifics bestinclass Vehicle Satisfaction award. Now get great deals on the nissan murano. [announcer] during mattress price wars at sleep train, save up to 400 on beautyrest and posturepedic. Get interestfree financing until 2018 on tempurpedic. Plus, helpful advice from the sleep experts. But mattress price wars is ending soon. At grocery outlet, they sell the brands you love. The brands you love. The brands you know and love. Even namebrand Natural Foods and organics. At prices up to 60 less than youd spend. At those bigname grocery stores. Hey right now at grocery outlet, its time again for our amazing wine sale. Save up to 70 on all wine things that i know. And love. Grocery outlet. Bargain market. Until we found a connection. You have the power to change your childs life. The Boys Town National hline can help. tdd 18004481433 finally tonight, call it crossgenre romance. Country musics golden boy Blake Shelton split from countrys golden girl Miranda Lambert, stepping out with punk princess gwen stefani who broke up with rocker husband Gavin Rossdale. Abcs mara ski aftercampo takes us behind the scenes of the new budding romance. When youre sweet youre so sweet. Oh. You never said Something Like that to me before. Reporter two superstar coaches of the voice are turning their chairs for each other. Rumors were swirling for weeks that country crooner Blake Shelton and rocker gwen stefani were more than coworkers. They were seen out and about at parties over halloween weekend. Yeah. Whos blake . Blake shelton. The country guy . Yeah. Reporter in an interview with Ryan Seacrest stefani dodged questions about a potential relationship. I read these stories about the two of you. Are those true or not true . Im not going to answer that right now. I think ive given up enough of myself this morning to you. I think hes hot, dont you . Reporter just hours before shelton performed at the Country MusicAssociation Awards wednesday, the rumors were confirmed. Representatives for both stars telling abc news they are dating. Stefani was spotted in Nashville Holding hands with shelton at a cma after party. Both stars announced marriage breakups this year. They really bonded over their broken marriages. This is really how they became such good friends. Reporter stefani and her husband Gavin Rossdale called it quits after being married 13 years. Shelton splitting with Miranda Lambert after four years of marriage. Countrys former power couple did not go unnoticed at the cmas. On a completely unrelated topic, howdy, blake. Reporter while he may be a little bit country and she a little bit rock n roll, for now musics newest crossover couple seems to be harmonizing in a perfect duet. For nightline, im Mara Schiavocompo in new york. Harmonizing, get it . Thanks for watching abc news. Tune into Good Morning America tomorrow. As always were online 24 7 on our Nightline Facebook page and abcnews. Com. With a 100 electric nissan what will you do . How far will you go . How much will you see . Electrify the world. Now with a classleading 107 miles on a charge, the nissan leaf is the best selling electric car in america