The answer is: Yes of course! Why not? Some people have the erroneous concept that Thai Massage is a mandatory sequence of massive stretches. This is simply not true.
Thailand’s primary massage therapy includes lots of techniques for working on the legs, the feet, the arms, the hands, the neck and the head. All of these can be done on pregnant women quite easily without even touching her mid section.
I remember the case of a nine months pregnant woman who really wanted a session. I did some work on her in the side position with a pillow under her extended belly, mostly working on her legs. Then I propped her upper body up with lots of pillows to a 45 degree angle and worked on her neck, shoulders, head and face. She totally loved it.
At another occasion I was invited to the birthday party of a friend of mine who was eight months pregnant. I offered her a massage as a birthday present. She chose a foot massage since her feet were really aching. After 30 minutes of that she rejoined the party and felt much better.
There is no reason to be afraid of working on pregnant women. In my experience they are very much in tune with their bodies and are quite intuitive about what works for them. As long as you communicate with them and ask them what feels right and what not, they will tell you. Let them guide you through the massage. They will be happy to tell you exactly what feels right for them.
If a woman is just a few months pregnant, you can often do many Thai massage techniques on her. If she is highly pregnant, common sense dictates that you cannot do heavy duty stretches and pressure techniques on her upper body. Thai Massage is not just a series of stretches. There are many techniques that work on muscles with no stretching at all. They can be done quite gently with kneading, rolling, rocking and squeezing.
Thai Massage has the reputation to be all about stretching. The fact is that it is quite possible to do an entire two hour session without doing any stretching at all.
There is a tendency that western therapists work with lots of stretching, whereas therapists in Thailand actually do much more muscle manipulation with less stretching. I have received countless sessions that involved very little stretching.
It does not matter how pregnant a woman is, you can always give her a great Thai foot massage, hand and arm massage, or neck, head and face massage. Depending on the progress of her pregnancy you can often work quite effectively on her back, hip and shoulders in the side position.
While Thai Massage is not a contraindication for pregnant women, it is definitely a job for an experienced therapist whose repertoire includes plenty of non-stretch techniques. If you want to work directly on the torso and mid section of a highly pregnant woman, this is probably better done with oil massage. In all other cases Thai Massage can be used effectively provided the therapist has the appropriate skills and experience. Combining it with oil massage can also be an excellent way of working on pregnant women.
Thai Massage and yoga are closely related. There are many yoga classes specifically designed for pregnant women. Yoga stretches and exercises can make pregnancy and delivery a much smoother and more pain free experience. It follows logically that Thai Massage can be equally beneficial for pregnancy.