Centuries: 3rd century - 4th century - 5th century
Decades: 250s - 260s - 270s - 290s - 300s - 310s - 320s - 330s - 340s - 350s - 360s
Years: 310 311 312 313 314 315 316 317 318 319
... various hormones controlling amongst many other things the menstruation cycle.
Normally, a female will have two ovaries, each containing a fixed number of eggs. I ...
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