I am genetically screening my future children. AMA.
My wife is a carrier of Becker's Muscular Dystrophy (MD) and we've decided that we want kids. Without IVF/PGD (explained in a moment), our children would have a 50% chance of being affected by MD, but thanks to this technology, we are now having a daughter who is 97% likely to be completely free of MD.
Here's some information on what we've gone through so far: To start, Genesis Genetic Institute built a genetic test suited for only us. They had to take DNA samples my wife and I, as well as other family members on her side. This test was then applied to the embryos. To make our embryos, she first went through the IVF process.
In the end of the IVF cycle, she produced 25 mature eggs, 20 of which grew into single cell embryos. By the third day, 18 of those embryos had grown to 6+ cells. Then they took one cell out of each embryo to genetically tested it see if it would be affected by MD or not, and also if it will be male or female.
Of those 18, 8 were affected by MD! The affected embryos were donated to embryonic stem-cell research. We were told that this was the first donation of embryos with Becker's Muscular Dystrophy ever. Of those 8 embryos, 6 were male and 2 were female carriers (females can only be carriers, but can still suffer heart-related issues as a result).
At this stage, we're left with 10 embryos. The doctors would only implant up to 2 embryos at a time, so we had them implant the fastest growing male and female embryos from the bunch. Those were embryos #3 and #7 from the pictures below. The remaining 8 healthy embryos were put in the freezer for future use. Of those 8, we have 4 female, 2 male, and 2 "gender-unknown".
Ask me anything. BTW the female is on the left and male was on the right.
update will come sometime in September