17 weeks pregnant: the key facts
| Trimester | Second trimester |
|---|---|
| Month of pregnancy | Month 4 (approximately) |
| Week of pregnancy | Week 18 (17 weeks completed) |
| Weeks to the due date | 23 weeks |
| Days since conception (approx.) | 105 days |
| Baby’s size (rough comparison) | About the size of a pomegranate |
What typically happens at 17 weeks
The skeleton is changing from soft cartilage to bone, and fat stores are beginning to form.
The second trimester is often the most comfortable stretch. Energy usually improves, the bump becomes more noticeable and movements become easier to feel as the weeks go by. At 17 weeks there are about 11 weeks until the third trimester starts at 28 weeks.
Every pregnancy is different, and the timing of tests and appointments depends on your healthcare provider and country. If something worries you — for example bleeding, severe pain, fluid leaking or, later in pregnancy, a change in your baby’s movements — contact your midwife, doctor or maternity unit straight away.
17 weeks pregnant in days and months
17 weeks is 119 days of pregnancy, counted from the first day of the last period, which is 43% of the way through a 40-week pregnancy. In months, 17 weeks is roughly 3.9 calendar months — usually described as month 4 of pregnancy. Because the baby’s age is counted from conception, it is about two weeks younger than the pregnancy: roughly 15 weeks of fetal age.
Your dates if you are 17 weeks pregnant today
Being 17 weeks pregnant today means the first day of your last period was around and conception most likely happened around . Your estimated due date is , and you will reach full term (39 weeks) around . For dates based on your actual period, use the calculator above or the main Due Date Calculator.
Other weeks
15 weeks pregnant · 16 weeks pregnant · 18 weeks pregnant · 19 weeks pregnant · full pregnancy timeline