Language :
SWEWE Member :Login |Registration
Encyclopedia community |Encyclopedia Answers |Submit question |Vocabulary Knowledge |Upload knowledge
questions :Fertilizetion by discred
Visitor (223.187.*.*)
Category :[Natural][Other]
I have to answer [Visitor (18.232.*.*) | Login ]

Picture :
Type :[|jpg|gif|jpeg|png|] Byte :[<1000KB]
Language :
| Check code :
All answers [ 1 ]
[Visitor (112.0.*.*)]answers [Chinese ]Time :2019-12-16
6 to 7 days after fertilization, the hyaline blastocyst disappears and is gradually buried and covered with endometrium. Need to go through three processes: 1. positioning; 2. adhesion; 3. penetration. Metamorphosis occurred quickly after implantation.

Animal sperm does not have obvious chemotaxis like lower plants, such as bryophytes, but instead reaches the egg by its own active movement or by the cilia of the reproductive tract epithelium. Human fertilization time: within 24 hours after ovulation. Place of fertilization: ampulla of fallopian tube.


版权申明 | 隐私权政策 | Copyright @2018 World encyclopedic knowledge