Pregnancy lasts an average of 40 weeks, so about 9 months, these indications are important but as you also know the estimated date of delivery does not always correspond to the actual date of delivery. 

Counting the weeks of pregnancy is very simple: it starts from the first day of the last menstruation. 

The first month of pregnancy runs from the 1st day of the last menstruation to 4 weeks + 3 days: a period when many mothers do not yet know they are expecting.

The second month ranges from 4 weeks + 4 days to 8 weeks + 5 days: mothers begin to feel the first symptoms of pregnancy.

The third month ranges from 8 weeks + 6 days to 13 weeks + 1 day and is the period of changes.

The fourth month goes from 13 weeks + 2 days to 17 weeks + 4 days-the mother's body has become accustomed to the changes.

The fifth month ranges from 17 weeks + 5 days to 21 weeks + 6 days: here there are large variations in weight.

The sixth month ranges from 22 weeks + 0 days to 26 weeks + 2 days: the baby has already almost developed all the senses.

The seventh month ranges from 26 weeks + 3 days to 30 weeks + 4 days: the baby begins to respond to external sound and tactile symptoms.

Theeighth month ranges from 30 weeks + 5 days to 35 weeks + 0 days: the Child changes position and prepares for the moment of delivery

The ninth month goes from 35 weeks + 1 day to 40 weeks + 0 days: the bulkiness of the belly is becoming more and more felt, the baby is ready to be born!