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Re: half-sibling twins From: anonymous@obgyn.net Sun, 30 Apr 2000 13:39:09 -0500 (CDT) Messages sorted by: [ date ][ thread ][ subject ][ author ] Next message: Kim: "Boats and Motorcycles" Previous message: William F. von Almen, II, MD, FACOG: "Re: miscarriage??" In reply to: CAT: "half-sibling twins" At Sat, 29 Apr 2000, CAT wrote: > >What are half-sibling twins? Is this a natural occurance or a result of >science? Both actually. Naturally it can occur with two ovulations at the same time, and sex with different partners around the same time with fertilization of both eggs. There are also occurences of mistakes made by infertility clinics where there have been inseminations where sperm was mixed, or zygote implantations where the zygotes were mixed. There was a case on "60 Minutes" about a white Dutch woman who gave birth to one white baby and one black baby when she was accidently implanted with one of her own zygotes, and one from a black couple that was there at the same time. -- William D. McIntosh, MD, FACOG Clarksville, TN This is for educational purposes only, and is not intended to be replacement or substitute for consultation and examination by an appropriate medical professional. Due to time constraints, private e-mails cannot be answered. Next message: Kim: "Boats and Motorcycles" Previous message: William F. von Almen, II, MD, FACOG: "Re: miscarriage??" In reply to: CAT: "half-sibling twins"

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