Which is a not an essential criteria according to WHO for normal semen analysis:
**Core Concept**
Normal semen analysis is a crucial diagnostic tool for assessing male fertility. The World Health Organization (WHO) has established reference values for semen characteristics, which are used as a benchmark for evaluating male reproductive health.
**Why the Correct Answer is Right**
The WHO criteria for normal semen analysis include parameters such as semen volume, sperm concentration, total sperm count, motility (progressive and non-progressive), and morphology. However, pH is not a critical parameter in the WHO criteria, as it is influenced by various factors and can be affected by sample handling. The WHO focuses on parameters that directly impact fertility potential.
**Why Each Wrong Option is Incorrect**
**Option A:** Semen volume is an essential parameter, as it reflects the amount of ejaculate and can affect fertility.
**Option B:** Sperm concentration is a critical parameter, as it directly impacts the likelihood of successful fertilization.
**Option C:** Total sperm count is also an essential parameter, as it reflects the total number of sperm present in the ejaculate.
**Clinical Pearl / High-Yield Fact**
It is essential to note that semen analysis is just one aspect of evaluating male fertility. Other factors, such as clinical history, physical examination, and hormonal assessment, should also be considered when evaluating male infertility.
**Correct Answer: D. pH**