Ultrasound is a diagnostic imaging technique that uses high-frequency sound waves to create images of the inside of the body. It is also called sonography.
Ultrasound: What is It and How Does it Work?
Fetal Development Week by Week: Conception to the Term
After the fusion of gametes, fertilized egg or zygote at 16 cell stage enters the uterine cavity for implantation. Thereafter, fetal development starts.
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