A woman had an extreme premature delivery . She gave birth to a baby boy at 23 weeks of gestation . The birth weight of the baby was 950 gm . Which of the following is most likely to be observed in this baby ?

Options

A. The baby's heart will not be adequately formed
B. The baby's limbs and digits will not be adequately formed
C. The baby's external genitalia will not be adequately formed
D. The baby's eyelashes will not be adequately formed

Answer

To solve the question regarding the likely observations in a baby born at 23 weeks of gestation, we need to analyze the development of various body parts during the gestation period.

### Step-by-Step Solution:

1. **Understanding Premature Birth**: The baby was born extremely premature at 23 weeks of gestation. Normal gestation lasts about 40 weeks, so this baby is born significantly earlier than the typical delivery time.

2. **Development Timeline**:
- **Heart Formation**: The heart begins to develop around the 3rd week of gestation and is adequately formed by the 8th week. By 23 weeks, the heart is fully developed.
- **Limb Formation**: Limbs start to develop around the 4th week and are adequately formed by the 8th week. By 23 weeks, limbs are also fully formed.
- **External Genitalia Formation**: External genitalia start to develop around the 7th week and are adequately formed by the 12th week. By 23 weeks, this development is complete.
- **Eyelash Formation**: Eyelashes and eyebrows begin to form much later, specifically after the 23rd week of gestation.

3. **Evaluating the Options**:
- **Option 1**: Baby's heart will not be adequately formed - Incorrect, as the heart is formed by the 8th week.
- **Option 2**: Baby's limbs and digits will not be adequately formed - Incorrect, as limbs are formed by the 8th week.
- **Option 3**: Baby's external genitalia will not be adequately formed - Incorrect, as external genitalia are formed by the 12th week.
- **Option 4**: Baby's eyelashes will not be adequately formed - Correct, as eyelashes form after the 23rd week.

4. **Conclusion**: The most likely observation in this baby, born at 23 weeks of gestation, is that the baby's eyelashes will not be adequately formed.

### Final Answer:
The baby's eyelashes will not be adequately formed.