How Many Weeks is 5 Months Pregnant

Pregnancy is a miraculous journey, full of exciting milestones and changes for both the mother and the developing baby. However, it’s also a period full of questions and uncertainties, and one of the most commonly asked questions is: “How many weeks is 5 months pregnant?” This question might seem straightforward, but due to different calendar months having varying numbers of days and weeks, the answer can be more complicated than you’d expect. This comprehensive guide will delve into this topic to help you understand the relation between weeks and months in pregnancy.

Understanding the Pregnancy Calendar

Lunar vs. Gregorian Calendar

Traditionally, pregnancy is measured in lunar months, which are 28 days long, making each month exactly 4 weeks. According to this, 5 months would mean you are 20 weeks pregnant. However, our commonly used Gregorian calendar doesn’t align perfectly with this system, leading to some confusion.

The Obstetric Method

Obstetricians often use a method that counts the total duration of a pregnancy as 40 weeks, divided into three trimesters. According to this calculation, 5 months of pregnancy would range from about 18 to 22 weeks.

Pregnancy Symptoms at 5 Months

Physical Changes

By the 5-month mark, your baby bump will be more noticeable. You may also experience increased appetite, and mood swings due to hormonal changes.

Baby’s Development

Around this time, the baby’s vital organs have formed and they begin to develop fatty tissues. You may also begin to feel fetal movements, known as “quickening.”

Why the Confusion?

Variability in Calendar Months

The number of days in different months varies (from 28-31 days), which makes a direct conversion from weeks to calendar months imprecise.

Ultrasound Adjustments

Sometimes, the estimated due date changes based on ultrasound findings, which can further add to the confusion around how many weeks equate to 5 months.

When to Expect Key Milestones

Around the 5-month mark, you can expect to:

  • Start feeling the baby move
  • Experience an increase in energy levels
  • Notice changes in your skin and hair

Frequently Asked Questions

Q: Is it normal to not feel the baby move at 5 months?

A: While many women start to feel their baby move around this time, some may not feel movements until a bit later, especially if it’s their first pregnancy.

Q: How can I calculate my due date?

A: The most accurate way is to get an ultrasound. However, you can also count 40 weeks from the first day of your last menstrual period.

Q: Why do healthcare providers use weeks instead of months?

A: Weeks offer a more precise measurement of pregnancy progression, which is crucial for monitoring the health of both the mother and the baby.

Q: Can the baby hear me at 5 months?

A: Yes, around this time, the baby’s hearing has developed to the point where they can hear your voice and even respond to certain stimuli.


Understanding the relationship between weeks and months during pregnancy can be tricky due to different calendar systems and individual variations. While the 5-month mark generally falls between 18 and 22 weeks, it’s always best to consult with your healthcare provider for the most accurate information tailored to your pregnancy.