SEARCH (Type the topic here)

Milestones of Prenatal development


1st week of gestation : fertilization and implantation , beginning of embryonic period.
2nd week of gestation : endoderm and ectoderm appear ( bilaminar embryo ).
3rd week of gestation : first missed menstrual period, mesoderm appears ( trilaminar embryo ), somites begin to form.
4th week of gestation : neural folds fuse, folding of embryo into human like shape, arm and leg buds appear , crown-rump length is 4 to 5 mm .
5th week of gestation : lens placodes,primitive mouth,digital rays on hands.
6th week of gestation : primitive nose , philtrum ,primary palate , crown-rump length 21 – 23 mm
7th week of gestation : eyelids begin
8th week of gestation : ovaries and testes distinguishable
9th week of gestation : fetal period begins, crown-rump length is 5 cms, weight is 9 grams .
10th week of gestation : external genitalia distinguishable
20th week of gestation : usual lower limit of viability ,weight is 460 grams , length is 19 cms
28th week of gestation : eyes open , fetus turns head down , weight is 1000 grams
38th week of gestation : term.

2 comments:

  1. My husband was diagnosed with early onset Parkinson's disease at 57.his symptoms were shuffling of feet,slurred speech, low volume speech, degradation of hand writing, horrible driving skills, right arm held at 45 degree angle, things were tough for me, but now he finally free from the disease with the help of total cure ultimate health home, he now walks properly and all symptoms has reversed, he had trouble with balance especially at night, getting into the shower and exiting it is difficult,getting into bed is also another thing he finds impossible.we had to find a better solution for his condition which has really helped him a lot,the biggest helped we had was ultimatehealthhome they walked us through the proper steps,am highly recommended this ultimatehealthhome@gmail.com to anyone who needs help.

    ReplyDelete

Related Posts Plugin for WordPress, Blogger...
Related Posts Plugin for WordPress, Blogger...