Lactational amenorrhoea means
A. Intentional or voluntary termination of pregnancy before the foetus become viable is called MTP or induced abortion.
B. Birth control pills (oral contraceptives) check ovulation in female by inhibiting the secretion of FSH and LH that are necessary for ovulation.
C.Coitus interruptus- It involves withdrawal of the penis from the vagina by the male before ejaculation so that semen is no deposited in vagina and no fertilization.
D. Intrauterine insemination is the donor male sperm into the female uterus.
E. Lactational Amenorrhea method- It is based on the fact that ovulation and therefore the menstrual cycle do not occur during the period of intense lactation following parturition.
So, the correct answer is 'Absence of menstruation during intense lactation'.