Use of artificial insemination (AI) for breeding pigs has been instrumental for facilitating
global improvements in fertility, genetics, labor, and herd health. The establishment of AI …

Objectives: To compare lifetime efficiency and by-parity reproductive performance of female
pigs categorized by culling reason or herd productivity group. Materials and methods …

Annual performance measurements, age structures of female pig inventories, and by-parity
culling rates were abstracted from data files of 110 herds that participated in a data-share …

Of 105 swine herds using a production record system for breeding female pigs, 95 farms
were used to analyze nonproductive female days (NPD), the six component intervals of …

High temperature is an environmental factor that impairs sow fertility. In this study, we
identified the critical weeks for heat stress effects on aspects of fertility performance, namely …

In weaned sows, reduced reproductive performance can result from failure or delayed return
to estrus or improper timing of insemination. This experiment evaluated the effect of …

The objective of this study was to evaluate the preserving capacity of a commercial, long-
term boar semen extender beyond 4 days in terms of farrowing failure and total born per …

Gilts and sows were bred one, two, or three times during a single estrous period in a
commercial herd for evaluating the effect of mating frequency on reproductive performance …

At-risk female pigs were defined as females having characteristics of at least one of the four
subgroups: females with reservices, lactation length (LL) 0–13days, weaning-to-first-mating …

The weaning-to-estrus interval (WEI) influences the total nonproductive days (NPD)
accumulated by the breeding herd and affects herd productivity. Short lactation lengths (LL) …