What is the gestation length for swine?

• A. 100 days
• B. 120 days
• C. 130 days
• D. 114 days

Answer: (D)

Gestation length is the period from conception to birth. For swine, the standard reference is about 114 days, roughly 3 months, 3 weeks, and 3 days. This timing is used to schedule breeding and predict farrowing, and it reflects the pig’s typical developmental pace. There is natural variation, with many litters farrowing within a few days of 114, often around 111–115 days; larger litter sizes can slightly alter the timing.

The other numbers are outside the usual range for pigs: 100 days is generally too short for complete fetal development, while 120 or 130 days would push farrowing later than the common expectation. Thus, 114 days is the best fit.