Sex during a low-risk pregnancy is safe. But safe does not always mean comfortable, and as a pregnancy progresses, the physical changes to a woman’s body can make sex that was previously enjoyable increasingly awkward, pressure-filled, or painful. Understanding why, and knowing what to do about it, matters both for a woman’s comfort and for the health of her relationship during a period that already puts considerable pressure on intimacy.

How Pregnancy Changes Sex

First Trimester

In the first trimester, the most common reason sex becomes less appealing or uncomfortable is not physical pain but the constellation of early pregnancy symptoms: nausea, fatigue, breast tenderness, and a general sense of bodily unease. Breast tenderness in particular can make any touch feel aversive, and this is worth communicating clearly to a partner who may not understand why ordinary contact is suddenly unwelcome.

Some women, however, notice the opposite in the first trimester, increased sensitivity and blood flow to the genitals that enhances arousal and sensation. Hormonal changes drive increased blood flow to the pelvic region, which produces swelling in the clitoris and labia and increased vaginal secretions. This is normal and not a cause for concern.

Light spotting after sex in the first trimester is also relatively common and usually harmless, caused by increased blood flow to the cervix, which makes it more prone to bleeding on contact. Any bleeding should be reported to a midwife or doctor for reassurance, but in most cases it resolves without intervention.

Second Trimester

The second trimester is frequently when desire and comfort are at their best. Early symptoms typically ease, energy returns, and the bump is not yet large enough to make most positions awkward. Vaginal lubrication and the intensity of orgasm often increase in this trimester, and orgasm may be accompanied by mild uterine contractions, which are normal and not a cause for concern in a healthy pregnancy.

Some women experience deep pelvic discomfort during sex in the second trimester as the uterus grows and the round ligaments that support it are stretched. This sharp, pulling pain, round ligament pain, typically feels like a stabbing or cramping sensation on one or both sides of the lower abdomen, often triggered or worsened by sudden movement, including during sex. Adjusting position and pace usually resolves it.

Third Trimester

The third trimester typically brings the most physical challenges. A larger bump changes the geometry of most sexual positions, creates pressure on the bladder and pelvis, and makes previously comfortable positions feel awkward or impossible. Many women also experience pelvic girdle pain in the third trimester, a musculoskeletal condition affecting the stability of the pelvis, which can make sex, and certain positions in particular, genuinely painful.

Libido often falls in the third trimester, both because of physical discomfort and because the approaching birth occupies increasing psychological space. This is normal and does not signal a permanent change in desire. Many women and their partners find it helpful to explicitly widen the definition of intimacy in this period, maintaining physical and emotional closeness through non-penetrative contact when penetrative sex is not comfortable.

Positions That Help

As the bump grows, positions that involve deep penetration or pressure on the abdomen become increasingly uncomfortable. The following tend to be more manageable:

• Side-lying (spooning): No pressure on the abdomen, shallow penetration angle, easily sustained for longer without fatigue.
• Woman on top: Allows the woman to control depth and angle of penetration. The bump hangs forward rather than being compressed.
• Rear entry: Similar advantages to spooning, no abdominal pressure, controllable depth.
• Edge of the bed: One partner lying at the edge of the bed with feet on the floor can remove the physical strain of some positions and reduce bump-related awkwardness.

Experimenting is the key principle. What works at twenty weeks may not work at thirty-four. What works for one couple may not work for another. There is no correct position for pregnant sex; there is only what is comfortable for both people right now.

When Pain During Sex in Pregnancy Needs Attention

Not all pain during sex in pregnancy is benign. The following warrant a conversation with a midwife or doctor:

Contact your midwife or doctor if you experience:

• Vaginal bleeding after sex that does not settle quickly
• Deep pelvic pain that is severe, persistent, or accompanied by contractions
• Pain accompanied by unusual discharge, fever, or signs of infection
• Leaking of fluid after sex (may indicate waters have broken)
• Pain that is new and unexplained in the context of a high-risk pregnancy
• Significant discomfort from pelvic girdle pain that is affecting daily life

When Sex Should Be Avoided

In most low-risk pregnancies, sex is safe throughout. There are specific circumstances, however, where a midwife or doctor may advise against penetrative sex:

• A history of premature labour or significant risk factors for it, such as a weakened cervix
• Placenta praevia, where the placenta lies low in the uterus, covering or near the cervical opening
• Confirmed rupture of membranes, if your waters have broken, penetrative sex carries a risk of infection
• Unexplained vaginal bleeding that has not been assessed

If any of these apply to you, your care provider should have discussed it. If you are unsure, ask directly.

For the full picture of dyspareunia causes and treatment, see our complete dyspareunia guide. For painful sex specifically after birth, see ‘Why Does Sex Hurt After Giving Birth?‘