Your SlideShare is downloading. ×
0
Human fertilization
Human fertilization
Human fertilization
Human fertilization
Human fertilization
Human fertilization
Human fertilization
Human fertilization
Human fertilization
Human fertilization
Human fertilization
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×
Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Text the download link to your phone
Standard text messaging rates apply

Human fertilization

10,951

Published on

A basic information to lay people & school going children about Human fertilisation

A basic information to lay people & school going children about Human fertilisation

Published in: Health & Medicine
1 Comment
2 Likes
Statistics
Notes
No Downloads
Views
Total Views
10,951
On Slideshare
0
From Embeds
0
Number of Embeds
2
Actions
Shares
0
Downloads
485
Comments
1
Likes
2
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
No notes for slide

Transcript

  • 1. Fertilization & Development 19 Nov. 2008 Fertilization.ppt
  • 2. Coitus &amp; Sperm Transfer <ul><li>2-3 phases </li></ul><ul><ul><li>Erection/engorgement: Parasympathetic reflex </li></ul></ul><ul><ul><li>Plateau </li></ul></ul><ul><ul><li>Orgasm: Sympathetic reflex </li></ul></ul><ul><ul><ul><li>Heart rate, contractility increase (pulse &amp; BP) </li></ul></ul></ul><ul><ul><ul><li>Intense pleasure </li></ul></ul></ul><ul><ul><ul><li>Ejaculation by male </li></ul></ul></ul>19 Nov. 2008 Fertilization.ppt
  • 3. Fertilization <ul><li>Contact of sperm &amp; secondary oocyte occurs in uterine tube </li></ul><ul><ul><li>Sperm penetration </li></ul></ul><ul><ul><li>Oocyte completes meiosis II </li></ul></ul><ul><ul><li>Nuclear fusion </li></ul></ul>19 Nov. 2008 Fertilization.ppt
  • 4. Fertilization <ul><li>Sperm penetration </li></ul><ul><li>Why so many? </li></ul>19 Nov. 2008 Fertilization.ppt
  • 5. Fertilization <ul><li>Oocyte completes meiosis II </li></ul><ul><li>Nuclear fusion </li></ul><ul><ul><li>1n + 1n  2n </li></ul></ul>19 Nov. 2008 Fertilization.ppt
  • 6. Early Development <ul><li>Cleavage in uterine tube </li></ul>19 Nov. 2008 Fertilization.ppt
  • 7. Early Development <ul><li>Implantation </li></ul><ul><ul><li>6-7 days after fertilization </li></ul></ul><ul><ul><li>Trophoblast forms placenta </li></ul></ul><ul><ul><li>“ Inner cell mass” forms embryo </li></ul></ul><ul><ul><li>(pp. 1118-1119) </li></ul></ul>19 Nov. 2008 Fertilization.ppt
  • 8. Early Development <ul><li>Implantation </li></ul><ul><ul><li>Trophoblast forms placenta </li></ul></ul><ul><ul><li>“ Inner cell mass” forms embryo </li></ul></ul>19 Nov. 2008 Fertilization.ppt
  • 9. Early Development <ul><li>Placenta </li></ul><ul><ul><li>Provides large area for exchange of O 2 , CO 2 , nutrients, metabolic wastes between fetal and maternal blood </li></ul></ul>19 Nov. 2008 Fertilization.ppt
  • 10. Pregnancy <ul><li>Pregnancy lasts 39-40 weeks, </li></ul><ul><ul><li>280 days from last menstrual period </li></ul></ul><ul><ul><li>3 trimesters </li></ul></ul><ul><li>Hormonal changes </li></ul>19 Nov. 2008 Fertilization.ppt
  • 11. Labor &amp; Delivery <ul><li>Dilation </li></ul><ul><ul><li>Cervix dilates to ~ 10 cm diameter </li></ul></ul><ul><ul><li>Effacement </li></ul></ul><ul><ul><li>Descent of fetus into birth canal (“Station”) </li></ul></ul><ul><li>Expulsion </li></ul><ul><li>Placental stage </li></ul><ul><ul><li>“ afterbirth” </li></ul></ul>19 Nov. 2008 Fertilization.ppt

×