Template:Mouse Rat Pig table

Postnatal Animal Models	Mouse	Rat	Pig
Pregnancy period (days)	18 – 21	21 – 23	110 – 118
Placenta type	Discoidal, decidual hemoendothelial choroidea	Discoidal, decidual hemoendothelial choroidea	Epitheliochorial
Litter size	6 – 12	6 – 15	11 – 16
Birth weight (g)	0.5 – 1.5	3 – 5	900 – 1600
Weaning weight male/female (g)	18 – 25/16 – 25	55 – 90/45 – 80	6000 – 8000
Suckling period (days)	21–28	21	28–49
Solid diet beginning (days)	10	12	12 – 15
Puberty male/female (week)	4 – 6/5	6/6 – 8	20 – 28
Life expectancy (years)	1 - 2	2 - 3	14 – 18