Can I drink black coffee while trying to conceive?
Generally, it is acceptable to drink black coffee in moderation during preconception, but attention should be paid to controlling the amount of coffee consumed. The details are as follows:

Drinking black coffee in moderation typically does not have negative effects on most people's health. The caffeine in black coffee can help enhance alertness, improve concentration and memory; however, excessive intake may lead to anxiety, insomnia, palpitations, and other issues. Therefore, during preconception, it is recommended that daily caffeine intake should not exceed 200–300 milligrams.
Caffeine may affect a woman’s endocrine system, potentially reducing estrogen secretion and impairing ovarian function and ovulation, thereby decreasing the chances of conception. In addition, excessive caffeine consumption may cause menstrual cycle irregularities, ovulatory disorders, and hormonal imbalances. Hence, coffee intake should be moderate during preconception, with an appropriate reduction in overall consumption.
Besides controlling caffeine intake, maintaining a healthy diet, regular sleep patterns, and consistent exercise habits during preconception can help increase the likelihood of conception and support overall health.