Vocabulary	Lengths of Estrus/Gestation	Parturition	Birth Positions
100 Time of conception to birth Gestation	100 6 days - Estrus cycle 320-370 days - Gestation Horse	100 Three (3) Parturition deals with this many stages	100 One leg forward with body upside down "Calf" upside down
200 Seasonal Breeders Are animals that only go into heat naturally during certain times of the year	200 8-30 hours - Estrus cycle 279-290 days - Gestation Cattle	200 Stage one is the initial stage that prepares for the delivery Stage one	200 Head bent back Both legs forward, head pulled behind
300 What do females cats go through when they have nursing kittens? Anestrus	300 12-24 hours - Estrus cycle 145-155 days - Gestation Goats	300 This is when the cervix opens and the fetus begins to enter the "pelvic canal" Stage two	300 Both sets of legs forward Hindlegs forward
400 Pheromones A chemical given off by females to attract and/or excite a male	400 3-21 days - Estrus cycle 58-65 days - Gestation Dogs	400 When the placental membranes are expelled from the uterus Stage three	400 "Calf" backward Hindlegs coming out first
500 The action of giving birth to young Parturition	500 10-41 days - Estrus cycle 58-67 days - Gestation Cats	500 Involution When the uterus starts to shrink back to normal size	500 Normal position of a "calf" Head and forelegs forward

Pregnancy and Parturition

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