Human fertilization - Wikipedia - Sperm penetrating egg

Like
91.73% | 525 votes

Only about 1 in 1 million sperm that are ejaculated into the vagina will reach the site of fertilization. Estrogen also relaxes the cervix, causes cervical mucus to. At the beginning of the process, the sperm undergoes a series of changes, as freshly ejaculated sperm is unable or poorly.

Categories: White pussy

Comments:

By Mit - 11:09
The idea that millions of sperm are on an Olympian race to reach the egg is yet another male fantasy of human reproduction.
By Yotilar - 20:52
While you release only a single egg each month, your partner releases millions of sperm in a single ejaculation — all with their eye on that.
By Tausida - 13:53
In the winner-takes-all game of fertilization, millions of sperm race toward the egg that's waiting at the finish line. Plenty of sperm don't even.
By Meztiran - 23:26
By Arashizilkree - 23:16

Related Videos

Van nuys eros station
506 366 06:37 HD
Crotchless valentines lingerie
4812 476 10:44 HD
Louisville mature 003
1606 110 20:46 HD
Bigted xxx
9286 220 23:18 HD
Porno snuff websites
5776 200 06:24 HD
Breath control bondage
2645 416 16:02 HD
Free downloadable porno
3930 410 09:21 HD
Fl footjobs
8567 97 09:30 HD
Fetish masquerade toronto
5973 177 16:34 HD
Creampie pussy free gallery
4748 325 08:06 HD