Horse Follicle Size Ovulation

It is recommended that the mare s ovaries be examined by palpation and ultrasonography at the time of pgf 2α administration to optimize the prediction of ovulation.

Horse follicle size ovulation. Each additional millimeter of endometrial thickness increased the optimal follicular size by 0 5 mm. By the sixteenth day of the cycle the developing follicle has reached the size at which it secretes enough hormone to bring on the external characteristics of heat. In 89 of the follicles the round shape became more irregular before ovulation. Day 11 of my cycle.

Around day 20 the follicle reaches its full size and ruptures releasing the egg into the fallopian tube ovulation. Thicker endometrial lining led to a higher probability of pregnancy. Woman told me one follice at 20 i think i have 7 in total strong one on left i believe. It standardizes the time frame.

The size then remained constant before diminishing by 2 3 mm during the last 12 hours. Time to ovulation is variable 3 10 days and depends on the stage of the mare s current follicular wave and on the size and character of follicles at the time of pgf 2α administration. My day 14 normal or average ovulation usually would be monday the 9th. She said i will be ovulating this weekend.

These changes take place 12 to 24 hours before ovulation giving the examining veterinarian information that can be used to pinpoint the optimum time for breeding. The optimal size of the leading follicle in ovulation induction with cc and letrozole is similar for both drugs and is closely related to the endometrial thickness. Had us and bw today. Reproductive history many broodmares ovulate a follicle of similar diameter important because a particular follicle size indicates impending ovulation each cycle said mccue.

A flattening effect to the top of the follicle may be seen when gentle pressure is applied with the ultrasound probe once the follicle starts to soften prior to ovulation. When the follicle nears maturity it becomes softer and changes from a spherical to a conical shape. I am to go tomorrow again for us and bw. Double follicles may ovulate at a smaller size and may feel like a single follicle on palpation.

Anything larger than a 35 mm is considered a breedable follicle. When giving an ovulatory stimulant such as hcg or deslorelin it really doesn t matter the size that the follicle grows. Ovulation is that point in the cycle when the unfertilized egg leaves the follicle and heads into the fallopian tube to hopefully meet up with sperm that is swimming toward it. A developing follicle increases in diameter until one or two days before ovulation.

The maximal diameter of the follicle was 43 4 mm. Hcg and or deslorelin work by expediting the time to ovulation not necessarily the size that the follicle will become.