Four months pregnant is approximately 16 to 18 weeks.

Explanation:

• Pregnancy is typically measured in weeks.
• One month is roughly 4.3 weeks (since a year has 52 weeks divided by 12 months).
• So, 4 months × 4.3 weeks/month ≈ 17.2 weeks.
• Usually, 4 months pregnant is considered to be between 16 and 18 weeks.

If you want a more exact number, it depends on the specific months and days, but 16 to 18 weeks is a good general estimate.