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Nub theory - can you predict if you're having a boy or girl?

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The difference between boys xex girls is fairly obvious at this stage. The sex of a baby is genetically determined at conception, but during the early development of embryos, they all look the same. All embryos have a small bud or swelling. It's known as the genital nub or protuberance. If you are having a boy, testosterone starts being produced when you are about seven weeks pregnant, prompting the bud to grow and develop into a penis and scrotum. In a girl the genital nub will become the clitoris and labia.

References This article was written using the following sources: Chigbu CO, Odugu B, Okezie O. Implications of incorrect determination of fetal sex by ultrasound. Int J Gynaecol Obstet 3: First trimester determination of fetal gender by ultrasound. Ultrasound Obstet Gynecol 13 5: Prenatal sonographic evaluation of male genitalia development. Minerva Ginecol 60 4: Show references Hide references. Enter your due date or child's birthday mm Jan Feb Mar Apr May Jun Jul Aug Cab Oct Nov Dec dd 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 marriage without dating dramawiki 19 20 21 22 23 24 25 26 27 28 29 30 31 yyyy The BabyCenter Bulletin Get the latest parenting news, plus expert advice and real-world wisdom.

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How early can I know if my baby is a boy or a girl?