Name the method which is based on fact that ovulation and therefore the cycle do not occur during the period of intense lactation following parturition:

Question

Accepted Answer

The correct answer is Option 4: Lactational amenorrhoea.

1. **Explanation for Option 4 (Lactational amenorrhoea):**
   Lactational amenorrhoea refers to the natural postpartum infertility that occurs when a woman is breastfeeding. During intense lactation, the body produces higher levels of the hormone prolactin, which is responsible for milk production. Elevated prolactin levels suppress the release of gonadotropin-releasing hormone (GnRH), which in turn reduces the secretion of luteinizing hormone (LH) and follicle-stimulating hormone (FSH) from the pituitary gland. This suppression prevents ovulation and menstruation, leading to a temporary period of infertility. This method is based on the biological fact that ovulation and the menstrual cycle are inhibited during the period of intense lactation following childbirth.

2. **Explanation for why other options are incorrect:**

- **Option 1 (Periodic abstinence):**
     Periodic abstinence, also known as the rhythm method, involves avoiding sexual intercourse during the fertile period of a woman's menstrual cycle. This method requires tracking the menstrual cycle to predict ovulation and is not related to lactation or the suppression of ovulation due to breastfeeding.

- **Option 2 (Coitus interruptus):**
     Coitus interruptus, or the withdrawal method, involves withdrawing the penis from the vagina before ejaculation to prevent sperm from entering the female reproductive tract. This method is a form of contraception that does not rely on hormonal changes associated with lactation and does not affect ovulation or the menstrual cycle.

- **Option 3 (Intra Uterine Devices - IUDs):**
     Intrauterine devices are contraceptive devices inserted into the uterus to prevent pregnancy. They work by creating an environment that is inhospitable to sperm and fertilized eggs. IUDs do not rely on the hormonal changes associated with lactation and do not affect the natural suppression of ovulation during breastfeeding.

In summary, Option 4, lactational amenorrhoea, is the correct answer because it directly relates to the natural suppression of ovulation and the menstrual cycle due to hormonal changes during intense lactation following childbirth. The other options involve different methods of contraception that do not rely on the physiological effects of breastfeeding.