context: Their reproductive abilities are concentrated when they are 50 days old, although a female mouse can start her first menstrual cycle at 25 to 40 days. The mice breed throughout the year with their eggs always available. Egg cycle days are 4 to 5 and menstruation lasts 12 hours from evening. The scents of their vagina are known to support the stage of female genital mutilation so they know when to have sex. Mice thrive at night and are proven / possible by holding semen in the vagina for 24 hours. The presence of sperm in the vagina is also one of the hallmarks of sexual intercourse. Mice carry pregnancy for 20 days. Bears bordering about 10 - 12 on a normal size of 0.5 to 1.5 kg, with hair in sight. With their eyes closed until they are stopped sucking after 3 weeks, and after 2-5 days, the female repeats her fertility cycle.
question: How many months do rats carry pregnancy?
answers.text: 20 days