CBSE Class 12-science - Population Explosion and Birth Control Videos

• write any three characteristics features of ideal contraceptive pills
• sir/madam,  plz i request u nt to think bad of me as I am asking this question.  1. what is the content of menstrual blood a) before tubectomy b) after tubectomy?
• Tubectomy and vasectomy 
• Government of India has raised the marriageable age of female to 18 years and of males to 21 years. Suggest two other measures for the same purpose.  
• What  is  AMNIOCENTESIS ?
• Mention any two events which are inhibited by the intake of oral contraceptive pills to prevent pregnancy in humans.
• The present population growth rate in India is alarming. Suggest ways to check it.  
• What are the commonly used barrier methods of contraception?
• Describe three ways in which fertilisation of the human ovum by a sperm can be prevented.
• Why intensely lactating mothers do not generally conceive? 

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