reporter: turning the pregnancy struggle into baby joy we re pregnant! i have a child! reporter: is not always easy. enter the preg prep kit, a supplement that s available over the counter at cvs starting this month that might help millions of women get pregnant. dr. lara oboler coming up with the idea during her own battle for a baby. i knew i was healthy. i knew there was nothing wrong with me. and for some reason, i wasn t getting pregnant. reporter: teaming up with a group of ob/gyns to design a pill that may encourage pregnancy by making it easier for the sperm to reach the egg. a sperm swimming to an egg is analogous to a person swimming from l.a. to tahiti. reporter: the kit comes in two parts a daily multivitamin and a mucolytic to thin the mucus, which women are encouraged to take leading up to their fertility window, known as ovulation. it was awesome. reporter: robin used preg