LH Surge in relation to other events in estrous cycle Flashcards
Onset proestrus to LH surge
-25 to -3
Maximal vaginal cornification to LH surge
-1 to +7
Start of estrus behavior
-4 to +5
Estradiol peak
-3 to 1-
Progesterone 1 to 2 ng/mL
-1 to 0
LH surge
0
Ovulation primary oocytes
+2 to +3
Fertilization
+4 to +6
Natural mating for maximum conception rate
-1 to +6
cytologic diestrus
+8 to +9
How long can sperm live in the uterus?
- 7-10 days
- Only in the vagina for some hours
Zygotes enter uterus (in relation to LH surge)
+11 to +12
Attachment sites established
+16 to +18
Ultrasound detection of amnionic cavity
+19 to +22
Ultrasound detection of fetal heartbeat
- +22 to +25
Earliest palpation of pregnancy
+20 to +25
radiograph detection of fetal skull
+44 to +46
Prepartum luteolysis and hypothermia
+63 to 63
Parturition
+64 to +66
When in relation to the LH surge would you inject thawed frozen semen?
About 5 or 6 days from LH surge
- Natural cover would be about 2 days
When to breed with natural cover?
- About 1 day before LH surge to about 4-5 days after
- Sperm can live in the uterus for 7-10 days
