While sex is safe for most couples in pregnancy, it may not be all that easy.
You will probably need to find different positions.
You might want to try some relaxation techniques or just lie down until the contractions pass.
Your midwife or doctor will probably advise you to avoid sex if you've had any heavy bleeding in this pregnancy.
Ferry companies have their own restrictions and may refuse to carry heavily pregnant women (often beyond 32 weeks). For longer boat trips, such as cruises, find out if there are onboard facilities to deal with pregnancy and if there are medical services at the docking ports.
Take care to avoid food- and water-borne conditions, such as stomach upsets and travellers' diarrhoea (TD). If you get ill, keep hydrated and continue eating for the health of your baby, even if you may not be hungry.
"The risk of catching an infectious disease far outweighs the risk from vaccination." For advice on specific travel vaccinations, consult your GP or midwife. Fatigue and dizziness are common during pregnancy so it's important on car journeys to drink regularly, eat natural, energy-giving foods (such as fruit and nuts) and stop regularly for a break.