How much does a pregnant sow weigh? September 14, 2022December 28, 2023BRA 0 Determining feed allowance To achieve this objective, gilts (Parity 0) should gain 120 to 130 pounds in their first gestation and first parity sows should gain 110 to 120 pounds from mating to farrowing.Related Posts:Dont Weigh Yourself Down: Choose the Ideal Sports Bra BrandWhat is the best bra when pregnant?What's the best bra to wear while pregnant?