Difference Between Subfertility and Infertility l Subfertility vs Infertility

The key difference between Subfertility and Infertility is that the subfertility is a condition where a couple is less likely to get pregnant compared to a normal couple while infertility is the inability of a sexually active, non-contracepting couple to achieve pregnancy in one year. Therefore, subfertility is a type of infertility.

Fertility is the capability to become pregnant under natural conditions and giving birth to offspring. Married couples face troubles in conceiving or sustaining a pregnancy. Subfertility, infertility, and sterility are three situations of such conditions.


1. Overview and Key Difference
2. What is Subfertility
3. What is Infertility
4. Similarities Between Subfertility and Infertility
5. Side by Side Comparison – Subfertility vs Infertility in Tabular Form
6. Summary

What is Subfertility?

Subfertility is a defined as a situation where a couple is less fertile compared to a normal couple. It does not mean that there is no chance of getting pregnant. It tells that there is a difficulty in becoming pregnant compared to others. Pregnancy may take a longer time when a couple is subfertile. However, they can become pregnant on their own without medical assistance in contrast to the condition called infertility. The word subfertility is used for a couple who are trying to become pregnant for a period of less than a year and couldn’t succeed yet.

There are different causes for subfertility. From the woman side, they can be ovulation problems, age-related factors, uterine problems, scarring of reproductive organs, etc. Low sperm count is the most encountered factor for subfertility in men. Furthermore, the combined factors of both partners can contribute to subfertility. Treatments for a subfertile couple are not immediate or aggressive at the beginning.

What is Infertility?

Infertility is a condition of the reproductive system where it is the failure to achieve a clinical pregnancy after 12 months or more of unprotected sexual relationship. On the other hand, infertility refers to the inability of a sexually active, non-contracepting couple to achieve pregnancy in one year.

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