Pregnancy By Week Calculator

How is an Average Length of a Menstrual Period Cycle calculated?

Average Length of a Menstrual Period Cycle is calculated by entering the date of the first day of your Last Menstrual Period (LMP). This is done after a close observation of your menstrual periods. The LMP of every month is counted and thus you arrive at the average length of a menstrual period cycle.

This is a list of the important weeks during your pregnancy.

• Week 2 : You are conceived.
• Week 4 : The pregnancy test is positive.
• Week 5 : Baby's organ formation starts. The heart starts functioning.
• Week 10 : All major organs are formed. The heartbeats are well-heard.
• Week 12 : Risk of miscarriage is reduced.
• Week 14 : The second trimester. Your pregnancy can now be announced!
• Week 15 : The baby can now see the light.
• Week 16 : The ultrasound can now reveal your baby's gender.
• Week 18 : Movements of your baby are felt.
• Week 19 : Your baby hears sounds.
• Week 23 : Baby born at this stage is called as a premature baby. Survival chances are still there.
• Week 27 : You are in your third trimester. Your baby can breathe.
• Week 32 : Baby's fingernails and toenails are formed.
• Week 37 : A full-term pregnancy is complete.
• Week 40 : Congratulations! You are due any time now.