i don't see a heartbeat. >> reporter: -- dr. sher does one more embryo transfer.me a heartbeat. >> do you see that, honey? >> oh, my gosh. i do. i do. >> reporter: mckenna lutzia johnson was born by c section at 23 weeks. barely viable. >> weighed one pound three ounces. >> she was in the nicu for probably around 146 days. >> this is mckenna's first diaper when she was born. this is her diaper now. so it's like how far she's come. >> reporter: the sher institute no longer holds a contest, but the johnsons' daughter is a living legacy. a miracle baby in every sense. now 2 years old. >> i would do everything all over again to get to her. she is my world. she's -- she's so worth everything. >> "vegas baby" is streaming on netflix. up next, the plus-size model who fought back against what she called body shaming, filming the dramatic confrontation with her seatmate. and later, kesha releasing her first new song in four years, "praying," with a special message. ♪ i hope your soul is changing ♪ changing it's time for a getaway. the lincoln summer invitation is on. now g

dr. sher's contest was the last chance. >> you guys are the winners. >> oh, my god!porter: and they hilt the jackpot. but others weren't so lucky. >> the wait is over. >> i hear voices, you know, from family and stuff. god has a plan. and i could only say i certainly hope so. >> ladies and gentlemen, welcome to las vegas. >> reporter: ann and brian travel to las vegas and undergo ivf with dr. sher. >> i loaded a single beautiful-looking embryo for ann johnson. are you ann johnson, ma'am? >> yes. >> that spark there, that's a bubble of fluid which contains the embryo. you can't see the embryo. it's only the size of a grain of sand. >> hello. >> hi. >> good news. >> i can tell by your face. you gave it away. >> i gave it away. great result here for you. i'm not lying. here it is. >> reporter: after a heartbreaking early miscarria miscarriage -- >> the measurement of the fetus unfortunately has not changed. i don't see a heartbeat. >> repor this time a heartbeat. >> do you see that, honey? >> oh, my gosh. i do. i do. >> reporter: mckenna lutzia johnson was born by c sec