A young female pig, known as a gilt, reaches maturity and can be bred, between day 170 and 220. Length of heat (estrus): 17-23 days; how long heat lasts: 24-72 hours. Gestation (pregnancy) is 114 days ...

China's huge hog sector is struggling with excess production after millions of small, often first-time, pig farmers entered the industry to capitalise on record profits during a swine-fever related ...