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Coitus/Conception (Day 1)
Fertilization forms zygote -
Period: to
Pregnancy
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Zygote Divides (Day 2)
Zygote has divided into 2 blastomeres -
Morula (Day 3)
Embryo is now called a morula and is comprised of 12 to 16 blastomeres -
Implantation (Day 6)
The blastocycst now implants into the uturine wall -
Skin Formation (Week 4)
Skin has began forming, it is so thin that it is transparent. Lower lip is formed. -
(Week 5)
Head is one third of the size of the embryo -
Nipples (5 Weeks 2 Days)
Nipples emerge on the embryo's trunk. -
Facial Growth (5 Weeks 6 Days)
Nose and jaw start to be formed -
Facial Development (6 Weeks 2 Days)
Tip of the nose emerges and eye folds are sometimes present. -
Volar Pads and Eyelids (6.5 weeks)
Volar pads are formed Upper and Lower eyelids are present and growing -
Fingertips (7.5 Weeks)
Fingertips start to thicken, plantar pads thicken -
Hair and Skin (Week 8)
Hairs begin to appear on eyebrows and around the mouth Skin becomes multilayered, it is no longer transparent -
Nose and Lips (11 weeks)
The nose and lips are fully formed -
Sebaceous Glands (12 Weeks)
Sebaceous glands are formed -
Fat (15 weeks)
Body fat emerges throughout the body -
Sweat (Week 18)
Sweat glands are formed -
Melanin (Week 19)
Melanin production starts -
Week 20
The fetus now has all skin layers Eyelids now seperate and eyes open and close -
Tears (Week 26)
Tear production starts -
Birth (Week 40)
