The advantage of using “strict” morphology criteria is that it can predict fertilization efficiency in IVF cycles. Conventional fertilization rates are highest when the percentage of morphologically normal sperm was > 14%. Fertilization rates were poor when there were < 4% normal sperm (P pattern).

Does sperm morphology affect IVF?

Conclusion: Moderately abnormal sperm morphology did not affect the fertility rate of IVF, but significantly decreased the quality of embryos; mildly abnormal sperm morphology had no obvious influence on the rates of fertilization, cleavage, quality embryos, implantation, clinical pregnancy and live births; while ...

Does IVF work with 0 morphology?

In couples with infertility, abnormal strict morphology of 0% normal forms (NF) is a criterion to proceed rapidly to in vitro fertilization (IVF).