Changes

Both women and men have hormonal cycles which determine both when a woman can achieve pregnancy and when a man is most fertile. The female cycle is approximately twenty-eight days long, but the male cycle is variable. Women ovulate at about the fourteenth day of their cycle, this obviously being the most fertile time for females (The 14th day is considered a common myth: [1]). Men can ejaculate and produce sperm at any time of the month, but their libido dips occasionally, which scientists guess is in relation to their internal cycle. A study done in Mexico suggests that men's libido levels are also sometimes correlated to their partner's monthly cycle.

Both [[women]] and men have hormonal cycles which determine both when a woman can achieve pregnancy and when a man is most fertile. The female cycle is approximately twenty-eight days long, but the male cycle is variable. Women ovulate at about the fourteenth day of their cycle, this obviously being the most fertile time for females (The 14th day is considered a common myth: [1]). Men can ejaculate and produce sperm at any time of the month, but their libido dips occasionally, which scientists guess is in relation to their internal cycle. A study done in Mexico suggests that men's libido levels are also sometimes correlated to their partner's monthly cycle.

During the fourteenth week of fetal growth, the eggs (or ova) form in the ovaries of a female fetus, where they will remain until puberty. At puberty, the eggs will eventually start to mature one-by-one. At ovulation, the egg bursts from the ovary sometimes causing a small, sharp pain called mittelschmerz (German for "middle pain"). If the egg is not fertilized by the male’s sperm, the egg will break down within twenty-four hours into its components (mostly protein) and be reabsorbed by the body.

During the fourteenth week of fetal growth, the eggs (or ova) form in the ovaries of a female fetus, where they will remain until puberty. At puberty, the eggs will eventually start to mature one-by-one. At ovulation, the egg bursts from the ovary sometimes causing a small, sharp pain called mittelschmerz (German for "middle pain"). If the egg is not fertilized by the male’s sperm, the egg will break down within twenty-four hours into its components (mostly protein) and be reabsorbed by the body.