the is because the preliminary result of superovulation with (400-560 mcg) stimufol among unflushed cows did not yield any embryos
10 cows each were treated with graded doses of stimufol (400, 440, 480, 520, 560)
Is it possible that one can induce superovulation in up to 60 cows yet not a single embryo recovered.
1. they were fed with normal maintenance ration supplemented with digitaria hay and bracharia hay
2. they had normal cyclicity and genitalia following ultrasound examination and heat monitoring
3. they consist equal numbers of heifer and adult cows
4. they're indigenous tropical breeds
5. p-36 protocol was used
6. follicular development was monitored with ultrasound from injection of first dose of FSH to day oestrus
Greeting:
You can check out the following:
1- Insemination (Semen viability and insemination time); it is also recommended to inseminate twice;
2- Heat stress (If you left the cows under a high temperature).
Best regards,
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