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 Pregnancy Trimesters

  Home >> Pregnancy
Pregnancy Calculator

Find changes in your body and development of fetus in different trimesters of pregnancy, how the fetus grows and develops inside the womb in different trimesters, find length, weight and how fetus looks like in different trimesters of your pregnancy.
Please select the pregnancy trimester ...
Trimester: 


Note: Information provided on this page is for general education only, growth of baby inside womb depends upon many factors and growth of your baby may differ slightly than indicated below, please seek medical advice whenever in doubt.

Pregnancy is typically broken into three periods, or trimesters, each of about three months or about 14 weeks, resulting in a total duration of 42 weeks, although the average duration of pregnancy is actually about 40 weeks.
»  First Trimester
»  Second Trimester
»  Third Trimester

Usually after 14 days of the last normal menstrual date ovulation occurs where the egg cell is released from one of the female's two ovaries. This egg cell unites with male sperm in one of the two fallopian tubes; this process is referred as fertilization where the egg cell fuses with the male gamete. The fertilized egg, known as a zygote, then moves toward the uterus, a journey that can take up to a week to complete. Cell division begins approximately 24 to 36 hours after the male and female cells unite. Cell division continues at a rapid rate and the cells then develop into what is known as a blastocyst. The blastocyst arrives at the uterus and attaches to the uterine wall, a process known as implantation.

In first 10 weeks of gestation the cell divides rapidly and begin to differentiate into the various body systems, the basic outlines of the organ, body, and nervous systems are established. By the end of the embryonic stage, the beginnings of features such as fingers, eyes, mouth, and ears become visible, during this time, there is also development of structures important to support the embryo, including the placenta and umbilical cord. Placenta connects the developing embryo to the uterine wall to allow nutrient uptake, waste elimination, and gas exchange via the mother's blood supply while the umbilical cord is the connecting cord from the embryo or fetus to the placenta.

After about 10 weeks of gestational age, the embryo becomes known as a fetus when the risk of miscarriage decreases sharply, at this stage the length of a fetus is typically about 30 mm (1.2 inches) and the heart can be seen beating via ultrasound; the fetus can be seen making various involuntary motions at this stage. During continued fetal development, the early body systems and structures that were established in the embryonic stage continue to develop. Sex organs begin to appear during the third month of gestation. The fetus continues to grow in both weight and length, although the majority of the physical growth occurs only in the last weeks of pregnancy.
Fetal Growth in ...
1st month2nd month3rd month4th month
5th month6th month7th month8th month
9th month10th month
Fetal Growth in ...
Week 1Week 2Week 3Week 4Week 5Week 6
Week 7Week 8Week 9Week 10Week 11Week 12
Week 13Week 14Week 15Week 16Week 17Week 18
Week 19Week 20Week 21Week 22Week 23Week 24
Week 25Week 26Week 27Week 28Week 29Week 30
Week 31Week 32Week 33Week 34Week 35Week 36
Week 37Week 38Week 39Week 40Beyond 40 weeks


Related ...
»   Due Date Calculator
»   When is Ovulation (Ovulation Calculator)
»   Pregnancy Calculator
»   Safe Period Calculator
»   Fetal Growth Calculator
»   Fetal Size Calculator
»   Pregnancy Weeks
»   Pregnancy Months
»   Baby Growth Calculator
»   Baby Name Search
»   Find Your Star Sign
»   Find Your Lucky Number
»   Birth Control Overview
»   Birth Control FAQs
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»   Waist to Hip Ratio Calculator
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»   Weight Management
»   Cloth size Conversion
»   Shoe Size Conversion
»   World Time - Find time at different places
»   Distance between Cities (or Town)
»   Calendar Creator



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