Pregnant women may defer الحج without sin if pregnancy poses health risks; those who choose to go should get medical clearance, stay hydrated, and take extra precautions against الحرارة and crowds.
Islamically, الحج is واجب only for those who are physically able (istitaa). If pregnancy poses a genuine health risk — due to complications, high-risk pregnancy, advanced gestational age, or the extreme physical demands and الحرارة of الحج — the obligation is deferred until the woman is able. There is no sin in postponing الحج due to pregnancy. Most scholars advise caution, especially for first-time pregnancies or pregnancies beyond the first trimester during الحج season.
If a pregnant woman in good health and with medical clearance chooses to perform الحج, she should: obtain thorough pre-travel consultation with her obstetrician, carry complete medical records including blood type and pregnancy details, bring all prenatal الأدويةs and vitamins, stay aggressively hydrated (pregnancy increases fluid needs significantly), and avoid the most crowded situations (use wheelchair services, stone at off-peak hours, use upper floors for الطواف).
The extreme الحرارة during الحج season (often 45-50°C), extensive walking (50-70 km over several days), crowding, and physical exertion create real risks for pregnant women including: deالترطيب, الحرارة exhaustion, falls in crowds, pre-term labor from stress and exertion, and limited access to obstetric الطوارئ care. المملكة العربية السعودية provides extensive medical facilities during الحج, but access can be delayed during peak times. Most medical professionals and scholars recommend postponing الحج to after delivery and recovery unless the pregnancy is early and uncomplicated.
Source: ابن قدامة, Al-Mughni, chapter on conditions of الحج obligation