The Cycling and Pregnant Mouse

摘要: Chapter Summary Studies of pregnancies in most strains mice are optimized by attentive observation external features the estrous cycle to ensure pairing with a male during female’s brief interval receptivity mating. Also important recognition copulation plug, indicative mating, and appearance pregnant female that becomes distinctive from midgestation. Monitoring can identify young females who became following undetected This permits early decisions for appropriate usage such animals. Premating obesity will complicate visual assessment pregnancy necessitate palpation fetuses abdomen confirm she is at mid- late pregnancy. Palpation should not be undertaken before suspected gestation day 12 since it may cause implantation site damage. External as well postmortem dissections gravid mouse its uterus illustrated show changes progress over