Fetal Development
Written by Administrator-GL   
Tuesday, 01 August 2006

    Goat Fetal Development Chart

  • 20 days~(3 weeks) Apparent Heart Beat
  • 21-35days~(3-5weeks)The lung bud branching and forming into the two principal bronchi
  • 28-35 days~(4-5 weeks) Limb buds apparent
  • 35-42 days~ (5-6 weeks) Differentiation of mouth,digits and dew claws
  • 42-49 days~( 6-7 weeks)Nostrils and Eyes apparent; Mammary buds in females; empty scrotal sac in males;Jugular vein barely visible through the pink skin
  • 42-84 days~(6-12wks)The bronchial divisions were differentiated and their air conducting system became established,lined with seudostratified and/or single-walled columnar epithelium
  • 49-56 days~(7-8 weeks)Eyelids Close; Ear Canal Opens; Membranous soft center in the top of the head
  • 56-63 days~ (8-9 weeks) Jugular vein, facial vein and scrotal vessels all visible; Nostrils open
  • 70-77 days~(10-11 weeks) Hairs appear on eyelids
  • 77-84 days~(11-12 weeks) Horn Pits Appear;Ear vein prominent; Hairs on eyelids and muzzle
  • 84-91 days~(12-13weeks) Hairs on forehead;Pigmentation around horn pits; Testes palpable in scrotum
  • 91-98 days~ (13-14 weeks) Skin whitish and thicker;Jugular, facial and scrotal veins no longer visible;Ear vein visible;Hairs along top of the neck;Top of the head has hardened-Also Lung Development-The respiratory bronchioles developed quickly,the primitive alveoli had developed,the respiratory bronchioles and primitive alveoli were lined by cuboid cells
  • 98-105 days~(14-15 weeks)Tooth Eruption;Hair around eyes and muzzle; Hairs on chest;Eyelids separated;Temporary teeth buds just appear
  • 105-112 days~(15-16 weeks)Body sparsely covered with hair, except limbs Also-Lung development-The respiratory divisions developed dramatically,the lung assumed a more “aerated” appearance.
  • 112-119 days~(16-17 weeks)Dense hairs cover body and limbs;Teeth buds prominent
  • 119 days~(17 weeks)1-3 Incisors barely erupted in females at birth; Incisors at gum line in males at birth
  • 119-154 days~(17-22 weeks)The alveoli developed and differentiated into flattened(type Ⅰ cell)and cuboid (type Ⅱ cell)epithelial cells of the lung development-here the baby can breath on it's own.
  • Length of Fetus at 30 days is 1.4 cm
  • Length of Fetus at 145 days is 43.0 cm
  • Normal Live Birth- 145 to 155 days~(147 days is 21 weeks or approx. 5 months)
Last Updated ( Sunday, 20 July 2008 )