We haven't talked too much about in vitro fertilization . But in vitro fertilization involves as the name suggests taking an egg and taking a sperm , pairing them in a dish . This can be done a number of different ways .
There are now emerging methods that people are using in order to separate out the sperm that will indeed give rise to a male offspring versus a female offspring . Now , this of course is done in the context of in vitro fertilization . We haven't talked too much about in vitro fertilization .
And what these clinics have figured out is that if they spin the sperm sample at the correct spin rate that the sperm that will give rise to male offspring and the sperm that will give rise to female offspring segregate out into different fractions , allowing them to take each of those fractions separately and to apply them to eggs . If it's in vitro fertilization and give rise very reliably , certainly much more than chance to either male or female embryos . They also , of course , can choose to do this outside the context of in vitro fertilization .
Now , this of course is done in the context of in vitro fertilization . We haven't talked too much about in vitro fertilization . But in vitro fertilization involves as the name suggests taking an egg and taking a sperm , pairing them in a dish .
And so typically , people do not select to implant those embryos if they have the option to implant embryos , that are of either xx or xy karyotype and the normal chromosomal um arrangements for obvious reasons . So the the whole point here is that sex selection is possible but only using in vitro fertilization . The other thing that is becoming clear to us in more recent years is that sex selection is actually possible at the level of the sperm even prior to fertilization .
