Head nearly as large as body; all major brain regions present; first brain waves
Liver disproportionately large and begins to form blood cells
Limbs present; digits are initially webbed, but fingers and toes are free by the end of this interval
Ossification (process of bone formation) just begun; weak, spontaneous muscle contractions occur Cardiovascular system fully functional [heart has been pumping blood since the fourth week)
All body systems present in at least rudimentary form
Weight: 1 gram [0.03 ounces)
9-12 weeks (Third month)
Head still dominant, but body elongating; brain continues to enlarge, shows its general structural features; retina of eye is present
Facial features present in crude form
Liver prominent and bile being secreted; Roof of mouth(palate) is fusing.
Blood cell formation begins in bone marrow ossification accelerating; limbs well molded
Gender readily detected
13-16 weeks (Fourth month)
Cerebellum becoming prominent; general sensory organs differentiated; eyes and ears assume characteristic position and shape; blinking of eyes and sucking motions of lips occur
Body beginning to outgrow head
Kidneys attain typical structure
Most bones are now distinct and joint cavities are apparent
17-20 weeks (Fifth month)
Lanugo (silklike hair) covers skin
Limbs reach near-final proportions
Quickening occurs [mother feels spontaneous muscular activity of fetus)
21-30 weeks (Sixth and seventh months)
Period of substantial increase in weight
Eyes are open
Skin is wrinkled and red; fingernails and toenails are present; tooth enamel is forming on deciduous teeth
Body is lean and well proportioned
Bone marrow becomes sole site of blood cell formation
30-40 weeks(eight and ninth months)
Skin whitish pink;
Weight: 2.7-4.1 kg (6-10 pounds)
Taken from: "Human Anatomy and Physiology." Elanine N. Mareib.
...desperate for husnul-khitaam...
please make dua that Allah grants me a good end (to my life). please make dua that Allah guides me.
What do you make of the tail-like feature at stage 16, anyone?
The tail is visible when the fetus is about 1 month old because the body frame as not fully developed yet. The "tail" sticks out from the body because the formation of the spine has not developed yet. This "tail" forms into our tailbone or coccyx and this keeps us in a up right position. This small little bone is said to be one of the most important bones in the entire body, because of it's functions.
Hope this helps, I was wondering myself, so I had to go look it up!
The tail is visible when the fetus is about 1 month old because the body frame as not fully developed yet. The "tail" sticks out from the body because the formation of the spine has not developed yet. This "tail" forms into our tailbone or coccyx and this keeps us in a up right position. This small little bone is said to be one of the most important bones in the entire body, because of it's functions.
Hope this helps, I was wondering myself, so I had to go look it up!
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