113.Phases of puerperium in sows Flashcards
How many days till farrowing till cyclic function and fertilizing ability?
28-40 days
How many days after proper weaning does heat return?
4-5 days
How many weeks suckling till proper involution?
4 weeks
what are the major phases of Puerperium in sows?
- Myometrial contraction & expulsion of lochia
- Endometrial repair
- Resumption of ovarian function
- Elimination of bacterial contamination
Describe the myometrial contraction and expulsion of lochia?
Myometrial contraction & expulsion of lochia (normal discharge) & placenta Compression
of uterine vasculature to minimize haemorrhage risk
Reduction of overall uterus size Oxytocin
→ ↑ Contraction
First 5 days post-partum → Rapid uterine weight loss
After 6 days post-partum → Further uterine weight loss; ↓ Cell number, cell size &
connective tissue; ↓ Thickness of endometrium & myometrium → Ends at 28 days
Describe the endometrial repair?
Endometrial repair
Day 1: Repair of low columnar/cuboidal epithelium
Day 7: Tissue loss → Epithelial degeneration & acute cell division
Day 21: Tissue repair → Completed epithelial regeneration → Ready for new pregnancy
What is the 3rd stage of puerpium in sows?
Resumption of ovarian function
Describe the elimination of bacterial contamination?
Elimination of bacterial contamination of the reproductive tract because the period of involution is
a gate for pathogens to enter the body → UTI
involution,oestrous and heat describe?
Proper involution of the uterus requires at least 4 weeks of suckling. Oestrus can only return once the
piglets are weaned; Lactation inhibits ovarian activity → Lactational anoestrus
Heat will start again 5 days after proper weaning.
Causes of delay for ovarian function?
- Lactation
- Inadequate nutrition
- Summer infertility
- Primiparous sow (maiden sows)
- stress
Positive effects on ovarian function return?
Lack of stress
eCG + hCG (PG 600)
Presence of a boar
flushing
Proper environment
Draw the table what happens after farrowing!
