We know it’s bad to stare at smartphone or tablet screens at night, but these habits can mess with more than just your sleep cycle. If you’re trying to get pregnant, you should be avoiding artificial nighttime Light. According to research, artificial nighttime light exposure can harm both your ability to conceive and fetal development if you’re already pregnant. Late-night light exposure can suppress melatonin production, the “sleep hormone,” that’s also produced in the reproductive tract and blocks eggs from damaging free radicals, particularly during ovulation. insufficient melatonin production can also disrupt a developing fetus’ internal clock, resulting in long-term problems.

Bottom line: Avoid light disturbances close to bedtime or while you are trying to score shut eye. Keep the tablets and phones out of your bed, shut off the TV and other light-emitting screens, and make sure your bedroom is really dark.