Professor Dr Zavos

Professor, Dr. Zavos, Director of the International Institute for Gender Selection


Frequently Asked Questions (FAQ's)

Q: What is gender selection?
A: The process of gender selection increases the chance of having a female or male child, by separating sperm that bear the X chromosome (female) and those that have the Y chromosome (male), and inseminating with whichever sample is desired. Options include Sperm Selection and IVF/PGD.
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Q: What is sperm selection?
A: This technique for alteration of the "chances" that a pregnancy of a selected gender will occur involves the physical separation of sperm. The human sperm cell is the gamete responsible for the determination of the sex of a resulting pregnancy.
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Q: What is PGD?
A: Employing embryo biopsy, couples undertaking in vitro fertilization (IVF) are afforded the opportunity of knowing the gender of each embryo prior to the decision concerning which embryos shall be returned to the womb via embryo transfer and which shall be safely stored for a later date. Clearly, if we are aware of the sex of an embryo while it remains still in our care, measures can be taken to assure that only embryos of a selected gender are returned to the womb for the possible establishment of pregnancy. In vitro fertilization with PGD is the only procedure where success rates are higher than 99.9%.
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Q: What is the success rate for gender selection?
A: Our success rate via gender selection using the sedimentation method is approximately 80% for male selection and 72% for female selection. The success rate for gender selection using the IVF/PGD method is 100% for male or for female selection.
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Q: What are assisted reproductive technologies?
A: The term 'assisted reproductive technologies' include techniques such as in-vitro fertilization (IVF) and intra-cytoplasmic sperm injection (ICSI). However, it can be defined as including all treatments that include medical and scientific manipulation of human gametes and embryos in order to produce a term pregnancy.
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Q: How do you test for female infertility?
A: Most tests used to detect fertility in the woman check if and when ovulation has occurred.  Other tests check for any structural abnormalities in her reproductive system. A listing of tests that your doctor may order can be found here.
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Q: How do you test for male infertility?
A: Anyone who is having trouble conceiving should have a semen analysis done. In about 40% of infertile couples, the cause of the infertility lies with the males, and this could easily and quickly be diagnosed via a semen analysis. A listing of other tests that your doctor may order can be found here.
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Q: What is IVF?
A: In-vitro fertilization (IVF) is the process whereby the female partner's ovaries are stimulated to produce eggs. These are then removed and placed together with her partner's sperm in a petri dish and allowed to fertilize. The resulting embryos are then transferred into her uterus after 2-3 days.
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Q: Do you accept insurance?
A: No, at this time we do not accept insurance. However, we will provide you with a receipt so that you may file a claim with your insurance company for re-imbursement.
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Q: Does shipping semen or sperm via other non-certified or properly tested semen shippers other than the BioTranz harm the sperm?
A: Definitely! Do not be fooled by imitations and ship your semen via non-certified or properly tested semen/sperm shippers such as those used to ship animal semen or other biological transporters. Do not take a chance with the health of your future child. Do it right! (See full article)



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