9 Historical Methods for Determining the Sex of an #Unborn #Baby
Are you #pregnant ? Do you like eating poultry and venison, and talking about jousting and knight stuff? Well, then you’re obviously carrying a boy. Like #dancing and #music ? It’s a girl.
Sure, it’s not the most #scientific of determinations, but for #women living in a #world before #ultrasounds , there was no way to tell just what or who or how many were in there. #Modern technology has made a window into a place which, for hundreds of thousands of years, only speculation illuminated.
So, if you don’t have the #benefit of that #window (which, by the way, isn’t always clear), how did you tell whether you were carrying a #boy or a #girl ? And perhaps even more important, could you choose which?
Before we get to the #good #stuff , here’s a #quick Bio 101 #primer on how it really works: #Human sex differentiation is dictated by the XX/XY #system . The egg cell (we’ll call her Sally) contains one #lady -making X chromosome; the sperm (let’s call him Harry) can carry either an #X or a #Y chromosome. When #Harry meets #Sally (see what we did there?), whether they’ll make a boy or a girl is dependent on which chromosome Harry’s packing. The Y chromosome stimulates testis formation in the fetus, and thus male sexual development; no Y chromosome, the gonads become ovaries and you’ve got yourself a girl. Pretty simple (except when there’s an anomaly, such as Klinefelter’s syndrome, an extra X #chromosome attached to the XY that can manifest in decreased fertility, increased breast tissue, and other ways). The #sex of the infant is set, though possibly not in stone, as soon as the #sperm fertilizes the egg, but the #sexual bits don’t develop for several weeks. Most parents don’t find out their baby’s #gender until the 20-week scan, if they do find out at all.