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3.Reproductive Health
medium
Natural methods of contraception work on the principle of avoiding chances of ovum and sperm meeting. It includes
$A.$ Periodic abstinence
$B.$ Withdrawal
$C.$ Coitus interruptus
$D.$ Lactational amenorrhoea
A
$A \;\& \;B\;only$
B
$B \,\&\, C\, only$
C
$A, B\;\&\,C$
D
$A, B, C\; \& \;D$
Solution
Periodic abstinence is natural method of avoiding coitus from day $10$ to day $17$ of menstrual cycle. Coitus interruptus or withdrawal is natural method in which the male partner withdraws his penis from the vagina just before ejaculation. Lactational amenorrhea is based on the fact that the menstrual cycle during intense lactation following parturition.
Standard 12
Biology
