Sperm quality affects fertility and miscarriage risk, not women’s appearance during pregnancy

Claim: A Facebook user claims that sperm quality can impact a woman’s body during pregnancy. 

Verdict:  Misleading! Scientific evidence and expert opinions show that poor sperm quality can affect fertility outcomes, but it does not directly impact a woman’s body or physical appearance during pregnancy.

Full Text

Pregnancy brings profound changes to a woman’s body, many of which begin long before the baby is born. From nausea and vomiting to more serious complications, these changes are often seen as unavoidable parts of the journey to motherhood, even when their causes are poorly understood.

A Facebook user, Osuchukwu Jane Ezeakolam, shared (archived here) the image of a pregnant woman to show how pregnancy changes a person. 

She wrote, “For a woman to look disfigured during pregnancy, it’s the quality of the man’s sperm …. Men put our body through a lot of horrors …”

The comment section was filled with users who agreed, questioned, and disagreed with the claim.

Chioma Peace agreed with the claimant, saying she is happy people are now researching this. 

“This is actually true. Some women are legit allergic to their husbands’ sperm. The man’s lifestyle and health matter so much. Some of the research shows that male sperm also plays a huge role in many miscarriages. I’m just happy they are researching this now,” Chioma wrote.

Missgift Kalu questioned, “So all of us wey look like this, our husband sperm no good abi healthy?” 

Another user, Ugorji Samuel, disagreed, saying, “Just a hypothesis, no scientific proof to this.. everybody just dey gba.”

Pregnancy-related health information is widely shared online without proper scientific context. The contradicting comments made DUBAWA verify this post.

Verification

We conducted a keyword search that led us to a scientific study on semen quality and pregnancy loss in the National Library of Medicine. The study tracked 344 couples from preconception through early pregnancy to examine the role of semen quality in pregnancy loss.

 Most traditional semen parameters, such as volume, motility, and morphology,  were not significantly associated with miscarriage. However, higher sperm DNA fragmentation was observed in men whose partners experienced pregnancy loss, suggesting a potential paternal contribution. Overall, routine semen quality appears to have a limited impact on early pregnancy loss, though DNA integrity may play a role.

According to another study done, recent findings point towards the fact that the father of the infant also has the power to influence the health of the pregnancy, especially in the genetic makeup of the sperm, the epigenetics, and the seminal fluid of the father, influencing the development of the placenta, the immune system of the mother, and the chances of the development of pre-eclampsia, amongst others. 

However, despite the findings, the health of the father in such matters has not been thoroughly explored in recent years.

Sperm quality and morning sickness 

In a recent study, researchers have suggested that your partner’s genetics and immune system may influence how your body responds to pregnancy.

For example, specific paternal genes may affect how your placenta develops, which in turn can influence hCG levels. Additionally, some immune system differences between partners may affect how your body responds to the pregnancy, potentially influencing symptoms such as nausea.

However, this connection is still being studied and likely plays a minor role compared with hormonal changes, your health history, and whether you’ve experienced nausea in past pregnancies. So while your partner’s health might have some influence, it’s not the leading cause of morning sickness.

Sperm quality and changes in women’s bodies

Seminal fluid, specifically components within the plasma (rather than the sperm itself), can induce physiological changes in a woman’s body. These effects primarily occur around conception and implantation, helping to modulate the immune response and promote tolerance to the embryo. These preparatory changes in the reproductive tract are essential for successful early pregnancy outcomes.

Sperm does not cause physical changes, such as the enlargement of a woman’s nose during pregnancy. Nasal changes, such as congestion or a stuffy nose (known as pregnancy rhinitis), result from hormonal shifts, including elevated estrogen and progesterone levels, increased blood volume, and swelling of the nasal mucous membranes.

Expert opinion

Halima Jimoh, a midwife, told DUBAWA that a man’s sperm quality does not drive the physical changes women experience during pregnancy.

According to her, “From my experience as a midwife, the body changes women experience in pregnancy are primarily driven by maternal hormones, placental activity, and the woman’s own physiology, not the man’s sperm quality.”

She clarified that sperm quality mainly influences how easily conception occurs and the health of the embryo in the very early stages of development. 

“Once pregnancy is established, body changes during pregnancy generally follow the same biological patterns regardless of sperm quality,” she added.

A family doctor, Abiola Ayanbukola, noted that some genes in the father’s semen can affect the health of babies and cause hereditary diseases, but cannot cause changes in the human body. 

“Usually, there are some conditions that some genes in the sperm can initiate some conditions like hypertension for the woman; we need more  information and research.”

She also noted that there is no proof yet of the claim that sperm can cause physical changes in a woman’s body. 

Conclusion

Hormonal changes, maternal health, and prior pregnancy history primarily drive symptoms such as changes in facial appearance and nasal swelling, not sperm quality.