The first day of a lady’s last menstrual period was 15 Sep 2019. What is the estimated date of delivery?

Correct option is C

To calculate the Estimated Date of Delivery (EDD), we use Naegele’s Rule:

1. Start with the first day of the last menstrual period (LMP):
   15 September 2019

2. Add one year to this date:
   15 September 2020

3. Subtract 3 months:
   15 June 2020

4. Add 7 days:
   22 June 2020

Thus, the Estimated Date of Delivery (EDD) is 22 June 2020.

Explanation of Options:

• (A) Incorrect: AFI of 10 cm is within the normal range and does not indicate polyhydramnios.

• (B) Incorrect: AFI of 20 cm is elevated but not enough for a diagnosis.

• (C) Correct: AFI >25 cm is used for diagnosing polyhydramnios.

• (D) Incorrect: AFI of 15 cm can be within normal limits and is not a concern.