- After implantation, the trophoblast form chorionic villi.
- Placenta is connected to embryo by umbilical cord.
- Various hormones are secreted by placenta which supports foetal growth and helps in maintaining pregnancy.
Class 12th Biology Video - [Video Summary - Chapter-03 - Lecture 9 - ( Pregnancy )]
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Useful links :
[Playlist Link] Related video can be found on mentioned playlist:
• 12th NCERT Biology (All videos topic wise)
• Chapter -1 (Reproducti... (Chapter - 1 "Reproduction in Organisms")
• 01 - Androecium - Stam... (Chapter - 2 "Sexual Reproduction in Flowering Plants")
[Video Notes] :
drive.google.com/file/d/1t6_Q... (this video notes)
drive.google.com/drive/folder... (complete chapter notes)
[Links to other related videos]
Videos on Chapter03- Human Reproduction :
1.) Male Reproductive System : • 01 - Male Reproductive...
2.) Female Reproductive System : • 02 - Female Reproducti...
3.) Female External Genitalia and Mammary Glan : • 03 - Female External G...
4.) Spermatogenesis : • 04 - Spermatogenesis
5.) Structure of Sperm : • 05 - Structure of Sperm
6.) Oogenesis : • 06 - Oogenesis
7.) Menstrual Cycle : • 07 - Menstrual Cycle
8.) Fertilization and Implantation : • 08 - Fertilization and...
9.) Pregnancy : • 09 - Pregnancy
10 : Parturition and Lactation : • 10 - Parturition and L...