You are now in 4th week of your pregnancy and the fetal age is 3 weeks, 2 days.
In this pregnancy week ...- The fertilized egg known as a zygote is implanted in the wall of the uterus and the placenta and umbilical cord begins to form.
- This week your baby is the size of a full-stop, or a poppy seed. It is still barely visible to naked eye.
- In this week there is a lot of organization and cell separation in progress and three distinct layers of cells start to form viz. the ectoderm (outer layer), mesoderm (middle layer), and endoderm (inner layer).
- Ectoderm, the outer layer, will eventually become the baby's skin, eyes, hair, their nervous system, their brain, and even the enamel of their teeth.
- Mesoderm, the middle layer will become their skeleton, muscles and kidneys, tissues and vascular (blood) system.
- Endoderm, the layer on the inside will eventually become their internal organs.
- Once a cell has a specific function, it can't become a different type of cell. Every one is pre-programmed from the start and knows what to do and what it is to become.
- Towards the end of this week and into next week, a transvaginal ultrasound can show a gestational sac. Yolk sac that helps feed your baby until the placenta is fully functional is appearing.
- Baby will grow to average length of about 0.1 inch or 2.5 mm Crown to Rump (CR) towards the ends of this week.
First trimester starts on very first day of your last menstrual cycle on 15-Apr-2024 and ends on 08-Jul-2024
Second trimester is from 09-Jul-2024 to 21-Oct-2024
While Third trimester begins 22-Oct-2024 onwards.
The expected date of birth of your baby is 20-Jan-2025, however depending upon fetal growth and your age, the baby may be born between 06-Jan-2025 and 27-Jan-2025.
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.
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