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Sexual development of twins

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From: geoconnon
Added: 24.01.2021
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The idea of conceiving twins can be fascinating. A woman can be pregnant with twins or multiples either by chance genetic factors or due to some medical treatments. There is no sure-shot way of getting pregnant with twins. This MomJunction post helps you understand how twin conception happens, what the odds of having twins are, factors that might increase the chances of giving birth to twins, and fertility treatments that may work. There are two types of twins — identical non-fraternal and non-identical fraternal 1.
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A Thing or Two About Twins

Skip navigation. In the mids, psychologist John Money encouraged the gender reassignment of David Reimer, who was born a biological male but suffered irreparable damage to his penis as an infant. Born in as Bruce Reimer, his penis was irreparably damaged during infancy due to a failed circumcision. Reimer underwent surgery as an infant to construct rudimentary female genitals, and was given female hormones during puberty. During childhood, Reimer was never told he was biologically male and regularly visited Money, who tracked the progress of his gender reassignment. The case provided results that were used to justify thousands of sex reassignment surgeries for cases of children with reproductive abnormalities. Despite his upbringing, Reimer rejected the female identity as a young teenager and began living as a male.
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David Reimer and John Money Gender Reassignment Controversy: The John/Joan Case

The relationship between biology and sexual orientation is a subject of research. While scientists do not know the exact cause of sexual orientation , they theorize that it is caused by a complex interplay of genetic , hormonal , and environmental influences. Biological theories for explaining the causes of sexual orientation are favored by scientists. The influence of hormones on the developing foetus has been the most influential causal hypothesis of the development of sexual orientation. The presence of the Y-chromosome in males prompts the development of testes, which release testosterone, the primary androgen receptor-activating hormone, to masculinize the fetus and fetal brain.
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