Which of the following is correct about human Reproduction ?

Options

A. Saheli is a new contraceptive for males
B. Amniocentesis is carried out to know the chromosomal pattern from the sample taken from the cells of umbilical cord.
C. Ovulation is facilitated by breast-feeding
D. A combination of progesterone and oestrogen is injected or implanted under the skin as an effective contraceptive

Answer

To determine which statement is correct about human reproduction, let's analyze each option step by step.

### Step-by-Step Solution:

1. **Option 1: Saheli is a new contraceptive form.**
- Saheli is actually a contraceptive for females, not males. It is an oral contraceptive pill that is part of the National Family Planning Program. Its technical name is Meloxicam, and it is marketed as Novax DS. Therefore, this statement is **incorrect**.

2. **Option 2: Amniocentesis is carried out to know the chromosomal pattern from the sample taken from the cells of the umbilical cord.**
- Amniocentesis is a procedure used to extract a small sample of amniotic fluid, not from the umbilical cord. The amniotic fluid surrounds the fetus and can be tested for genetic and chromosomal abnormalities. Thus, this statement is also **incorrect**.

3. **Option 3: Ovulation is facilitated by breastfeeding.**
- Ovulation is the release of a mature egg from the ovary. Breastfeeding actually inhibits ovulation due to hormonal changes in the body, specifically the increased levels of prolactin. Therefore, this statement is **incorrect**.

4. **Option 4: A combination of progesterone and estrogen is injected or implanted under the skin as an effective contraceptive.**
- This statement is true. Combined hormonal contraceptives, which consist of estrogen and progesterone, are indeed used as effective contraceptives. They can be administered through injections or implants, and they work by preventing ovulation and inhibiting the hormones necessary for pregnancy. Thus, this statement is **correct**.

### Conclusion:
The correct statement about human reproduction is that **a combination of progesterone and estrogen is injected or implanted under the skin as an effective contraceptive**.

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