Fetal Growth Calculator


First day of your Last Menstrual Period

You are now in 5th week of your pregnancy and the fetal age is 4 weeks, 2 days.

In this pregnancy week ...
  • The gastrointestinal tract, spinal cord, heart, brain, blood and blood vessel begins to form.
  • The embryo is about the size of an orange seed or a nail-head and can just be seen on an ultrasound. It is now possible to differentiate between the head and the tail of your baby.
  • Baby's heart begins to beat.
  • The baby looks like a tadpole and has a primitive heart which has already started beating and circulating blood around its little body.
  • Your baby's brain and spinal cord are forming but are still open.
  • Baby will grow to average length of about ¼ inch or 4 to 6 mm Crown to Rump (CR) towards the ends of this week.

First trimester starts on very first day of your last menstrual cycle on 01-Apr-2025 and ends on 24-Jun-2025

Second trimester is from 25-Jun-2025 to 07-Oct-2025

While Third trimester begins 08-Oct-2025 onwards.

The expected date of birth of your baby is 06-Jan-2026, however depending upon fetal growth and your age, the baby may be born between 23-Dec-2025 and 13-Jan-2026.

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

◄ Growth in Week 4Growth in Week 6  ► 
Jun - 2024
SuMoTuWeThFrSa
      1
2345678
9101112131415
16171819202122
23242526272829
30      
Sep - 2024
SuMoTuWeThFrSa
1234567
891011121314
15161718192021
22232425262728
2930     
Nov - 2024
SuMoTuWeThFrSa
     12
3456789
10111213141516
17181920212223
24252627282930
Feb - 2025
SuMoTuWeThFrSa
      1
2345678
9101112131415
16171819202122
232425262728 
Mar - 2025
SuMoTuWeThFrSa
      1
2345678
9101112131415
16171819202122
23242526272829
3031     
Apr - 2025
SuMoTuWeThFrSa
  12345
6789101112
13141516171819
20212223242526
27282930   
Pregnancy Trimesters
»  First Trimester
»  Second Trimester
»  Third Trimester
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Beyond 40 weeks
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