The 40 weeks of pregnancy

The weeks of pregnancy are counted from the date of the last menstrual period and are divided into three trimesters. Each week has special features for both you and your child: let’s see them together!

How many weeks is a pregnancy?

By convention, a pregnancy lasts 40 weeks , counting from the first day of the last menstrual flow. However, a delivery is considered full-term even if it occurs between 37 and 41 weeks .

Since the length of gestation is calculated based on the last period, this means that there is still no baby in the first and second weeks . In those days, in fact, the body will be preparing for ovulation and possible fertilization.

The development of the embryo therefore only begins in the third week , which corresponds to the first week of actual pregnancy . From this moment on, the rapid increase in beta-HCG and other pregnancy hormones will also begin, which will give rise to the first symptoms of conception within a few days or weeks .

The 40 weeks of pregnancy

Do you want to know week by week all the changes in your body , your baby’s growth stages and the midwife’s advice to better enjoy the wait and prepare for childbirth?

Below you will find a table with all 40 weeks of pregnancy , divided by trimester . By clicking on each week in the list, you will be able to access the corresponding information.

We have also included an extra week , to be able to provide you with all the useful information in case your little one has to wait longer than expected. In about 30% of cases, in fact, the pregnancy lasts longer than the 40 weeks established by convention .

• 1st week of pregnancy  from 0+0 to 0+6
• 2nd week of pregnancy from 1+0 to 1+6
• 3rd week of pregnancy at 2+0 at 2+6
• 4th week of pregnancy from 3+0 to 3+6
• 5th week of pregnancy from 4+0 to 4+6
• 6th week of pregnancy from 5+0 to 5+6
• 7th week of pregnancy from 6+0 to 6+6
• 8th week of pregnancy from 7+0 to 7+6
• 9th week of pregnancy from 8+0 to 8+6
• 10th week of pregnancy from 9+0 to 9+6
• 11th week of pregnancy from 10+0 to 10+6
• 12th week of pregnancy from 11+0 to 11+6
• 13th week of pregnancy from 12+0 to 12+6
• 14th week of pregnancy  from 13+0 to 13+6
• 15th week of pregnancy from 14+0 to 14+6
• 16th week of pregnancy from 15+0 to 15+6
• 17th week of pregnancy from 16+0 to 16+6
• 18th week of pregnancy from 17+0 to 17+6
• 19th week of pregnancy from 18+0 to 18+6
• 20th week of pregnancy from 19+0 to 19+6
• 21st week of pregnancy from 20+0 to 20+6
• 22nd week of pregnancy from 21+0 to 21+6
• 23rd week of pregnancy from 22+0 to 22+6
• 24th week of pregnancy from 23+0 to 23+6
• 25th week of pregnancy from 24+0 to 24+6
• 26th week of pregnancy from 25+0 to 25+6
• 27th week of pregnancy from 26+0 to 26+6

• 28th week of pregnancy from 27+0 to 27+6
• 29th week of pregnancy from 28+0 to 28+6
• 30th week of pregnancy from 29+0 to 29+6
• 31st week of pregnancy from 30+0 to 30+6
• 32nd week of pregnancy from 31+0 to 31+6
• 33rd week of pregnancy from 32+0 to 32+6
• 34th week of pregnancy from 33+0 to 33+6
• 35th week of pregnancy from 34+0 to 34+6
• 36th week of pregnancy from 35+0 to 35+6
• 37th week of pregnancy from 36+0 to 36+6
• 38th week of pregnancy from 37+0 to 37+6
• 39th week of pregnancy from 38+0 to 38+6
• 40th week of pregnancy from 39+0 to 39+6
• 41st week of pregnancy from 40+0 to 40+6