Youtop Video Search



sperm under a microscope
351450 | 00:14 | 2024-06-04

behind the sperm and ejaculation
6541181 | 04:06 | 2024-06-04


sperm death in the uterus
5125644 | 01:56 | 2023-06-04

sperm count nucleus health
8632855 | 04:31 | 2015-06-04

misterious lumps in the semen urochannel
118386 | 00:54 | 2023-06-04

fertilization
83751983 | 05:43 | 2013-06-04

how sperm learn to swim
1318944 | 00:20 | 2023-06-04

improving sperm quality
3590 | 00:29 | 2023-06-04

the insane biology of the sperm whale
3908387 | 20:03 | 2023-06-04

the sperm and the egg shorts youtubepartner
31063799 | 00:33 | 2022-06-04