Jet Lag During Pregnancy: Coping Strategies

What does the evidence say about jet lag during pregnancy?

1. Jet lag affects an estimated 68% of international business travelers and results from a temporary mismatch between the body's internal clock and local time after crossing at least two time zones, causing sleep disruption, daytime drowsiness, and general malaise for a day or two. 1
2. Westward travel is easier to adjust to than eastward travel. The body's clock naturally shifts later at an average of about 1.5 hours a day going west, compared with only about 1 hour a day adjusting earlier when going east. 1
3. Practical adjustment strategies include shifting bedtime by an hour or two toward the destination's schedule before departure, seeking bright morning light to shift the clock earlier for eastward trips or evening light to shift it later for westward trips, and staying well hydrated while limiting alcohol and excess caffeine, both of which worsen symptoms. 1
4. A pre-travel consultation that includes an obstetric healthcare professional is recommended for pregnant travelers, assessing gestational age and any factors that raise the chance of a pregnancy complication before finalizing an itinerary that crosses multiple time zones. 2
5. General sleep hygiene recommended during pregnancy, a consistent sleep and wake schedule, a disruption-free sleep environment, avoiding daytime naps, regular exercise, and a relaxing pre-sleep routine, applies just as well to recovering from jet lag as it does to managing pregnancy insomnia generally. 3
6. In healthy nulliparous women in the third trimester, greater evening light exposure in the 3 hours before bed was linked to a shorter total sleep time and an earlier sleep midpoint on objective sleep tracking, a pregnancy-specific example of the same light-timing principle behind standard jet lag advice. 4

Is jet lag safe in each trimester?

• First trimester. First-trimester fatigue is already common, so jet lag layered on top can be hard to tell apart from ordinary early pregnancy tiredness. A pre-travel visit with your obstetric provider is especially worth doing now if you have any condition that raises the chance of a pregnancy complication.
• Second trimester. The second trimester is often the most comfortable window for travel, which also makes it a reasonable time to test whether light timing or a gradual pre-trip schedule shift works better for you, before a longer or more complicated trip later on.
• Third trimester. Third-trimester sleep is already more fragile. Research on evening light exposure in this trimester found it was linked to shorter total sleep and a later sleep midpoint even without travel involved, which suggests jet lag recovery may take more deliberate light management than it did earlier in pregnancy.

Adjusting to time zones during pregnancy