LH Surge in relation to other events in estrous cycle

Question 1

Onset proestrus to LH surge

Answer 1

-25 to -3

Question 2

Maximal vaginal cornification to LH surge

Answer 2

-1 to +7

Question 3

Start of estrus behavior

Answer 3

-4 to +5

Question 4

Estradiol peak

Answer 4

-3 to 1-

Question 5

Progesterone 1 to 2 ng/mL

Answer 5

-1 to 0

Question 6

LH surge

Answer 6

0

Question 7

Ovulation primary oocytes

Answer 7

+2 to +3

Question 8

Fertilization

Answer 8

+4 to +6

Question 9

Natural mating for maximum conception rate

Answer 9

-1 to +6

Question 10

cytologic diestrus

Answer 10

+8 to +9

Question 11

How long can sperm live in the uterus?

Answer 11

• 7-10 days

- Only in the vagina for some hours

Question 12

Zygotes enter uterus (in relation to LH surge)

Answer 12

+11 to +12

Question 13

Attachment sites established

Answer 13

+16 to +18

Question 14

Ultrasound detection of amnionic cavity

Answer 14

+19 to +22

Question 15

Ultrasound detection of fetal heartbeat

Answer 15

• +22 to +25

Question 16

Earliest palpation of pregnancy

Answer 16

+20 to +25

Question 17

radiograph detection of fetal skull

Answer 17

+44 to +46

Question 18

Prepartum luteolysis and hypothermia

Answer 18

+63 to 63

Question 19

Parturition

Answer 19

+64 to +66

Question 20

When in relation to the LH surge would you inject thawed frozen semen?

Answer 20

About 5 or 6 days from LH surge

• Natural cover would be about 2 days

Question 21

When to breed with natural cover?

Answer 21

• About 1 day before LH surge to about 4-5 days after

- Sperm can live in the uterus for 7-10 days