A typical pregnancy lasts about 40 weeks from the first day of the woman's last menstrual period (LMP) to the birth of the baby. This is roughly 9 months.

Breakdown:

• Full-term pregnancy: 37 to 42 weeks
• Preterm: Before 37 weeks
• Post-term: After 42 weeks

If you want, I can provide more details about the stages of pregnancy or how weeks are counted!