If you have an extremely short cycle, then the time you ovulate could overlap with your period and you could get pregnant if you have unprotected sex.
It happens very rarely, but it can occur: Women can become pregnant a second time during pregnancy—sometimes even by two different men. This phenomenon is known as superfetation. But how is it ...
At first glance, it looks like the start of a human pregnancy: A ball-shaped embryo presses gently into the receptive lining ...
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