changing the sex of an embyro

they can change the sex...if the original dna was the X chromosome they will take out a chromosome so it will be Y...or vice versa..i have questions. so, this is already a fertilized embryo, meaning...the original sex was already determined, but no...the geneticist will then extract cells, changing it. so if this was originally supposed to be a male, they will take out the cells to make it a female...yes, more questions. this makes it look like they pick out all the male ones and female but this is saying it will not affect the characteristics...etc 'the genome of the entire person'...hmmmm. methinks. (i hate that term lol) but yeah..interesting.

IVF/PGD technique[edit]

An 8-celled embryo prior to IVF/PGD analysis

Further information: IVF and Preimplantation genetic diagnosis

After ovarian stimulation, multiple eggs are removed from the mother. The eggs are fertilized in the laboratory using the father's sperm in a technique called in vitro fertilization (IVF). "In vitro" is Latin for "within glass". Fertilized eggs are called embryos. As the embryos develop through mitosis, they are separated by sex. Embryos of the desired gender are implanted back in the mother's uterus.

Prior to fertilization with IVF, the fertilized eggs can be genetically biopsied with preimplantation genetic diagnosis (PGD) to increase fertilization success.^[23] Once an embryo grows to a 6-8 cell size, a small laser incision in the egg membrane (zona pellucida) allows safe removal of one of the cells.^[24] Every cell in the embryo contains an identical copy of the genome of the entire person. Removal of one of these cells does not harm the developing embryo.^[25] A Geneticist then studies the chromosomes in the extracted cells for genetic defects and for a definite analysis of the embryo’s gender.^[26]Embryos of the desired sex and with acceptable genetics are then placed back into the mother.

The IVF/PGD technique is favored over the Ericsson method because of the stricter control of the offspring gender in the laboratory. Since only embryos of the desired sex are transferred to the mother, IVF/PGD avoids the small likelihood present in the Ericsson method of an undesired sperm fertilizing the egg. Gender selection success rates for IVF/PGD are very high. The technique is recommended for couples who will not accept a child of the undesired gender.^[27][28]

Timing methods