Changes

==Growth Rates==

==Growth Rates==

* After hatching, the conceptus undergoes massive growth.

* After hatching, the conceptus undergoes massive growth.

** Cow: Blastocyst is 3mm in diameter at day 13 of gestation, enlarges to 250mm in length (elongation) day 14-16 and appears as a fillamentous thread.  By day 18 of [[Reproductive System - Anatomy & Physiology#Gestation|gestation]], the blastocyst occupies space in both uterine horns.

** Cow: Blastocyst is 3mm in diameter at day 13 of gestation, enlarges to 250mm in length (elongation) day 14-16 and appears as a fillamentous thread.  By day 18 of gestation, the blastocyst occupies space in both uterine horns.

** Pig: Blastocysts are 2mm spheres at day 10 of gestation.  During the next 24-48 hours, they elongate to ~200mm in length.  By day 16, the blastocyst reaches lengths of 800-1000mm.

** Pig: Blastocysts are 2mm spheres at day 10 of gestation.  During the next 24-48 hours, they elongate to ~200mm in length.  By day 16, the blastocyst reaches lengths of 800-1000mm.

For further information on extraembryonic membranes, attachment, placentation and maternal recognition of pregnancy follow [[Reproductive System - Anatomy & Physiology#Gestation|this link]].

For further information on extraembryonic membranes, attachment, placentation and maternal recognition of pregnancy follow [[:Category:Pregnancy and Parturition|this link to Pregnancy and Parturition]].