Whenever you add a prefix or suffix YOGA to anything you do, remember it comes with a whole aspect of mindfulness of right conduct of living, proper breathing, proper diet and proper rest. Each of the postures that you do will be beneficial if you are comfortable in the pose, your breathing is very rhythmic and you are feeling completely at ease. If you have been into yoga practices earlier, it's good to continue doing them keeping the above points in mind. Feeling nauseous is very common during the first trimester, very few are not impacted by this feeling.  This can result in a lot of stress and anxious moments, that can further aggravate nausea and vomiting. A sensitive digestive system could make you feel worse as the body is adapting to hormonal changes. Morning sickness remedies differ for each individual. The best way is to find out what suits you is by referring to women who have gone through it or by trial and error basis. Always remember that each experience is unique. Apart from finding foods that help you in managing nausea, exercises are a good way to manage this change. A brisk mindful walk in fresh open space can help you feel better. As far as yoga postures go, remember the mantra of Yogasanas (Sthiram, Sukham Asanam). Look for asanas that help you relax. When you practice Yogasanas, make sure that the room is well ventilated. Avoid air-conditioned rooms. That may make you more nauseous. Work on each posture slowly. Sudden movements can make you feel nauseous. You may use pillows or blocks as props and modify each posture to your comfort. Breathe as deeply as you can. When you breathe deep, the abdominal muscles and the diaphragm relax. This will help alleviate feelings of sickness in the stomach. Surya Namaskar postures are very beneficial. Just avoid the ashtanga Namaskar pose in the sequence. For those new to yoga very simple postures can be introduced. Balasana is a seated forward bend that soothes the worked up nervous system, it tones up digestive functions by massaging internal organs through deep breathing. Badhakonasana and suptabadhakonasana with hands raised above the head can open up the chest. This can stimulate the reproductive and digestive organs by releasing the pressure of the stomach and liver. Viparitakarni with wall support helps venous flow of blood towards the heart. This asana is good for all mind and body issues. It's very useful when feeling nauseous. Just be careful if you feel a lot of pressure in your head or have an aching neck or back. Shavasan is a great pose to ease stress and thereby help dealing with queasy feelings. Lying down on your back or on your side, taking a few deep breaths and then easing back to normal way of breathing and resting is another way to escape morning sickness. Pranayama practices such as deep slow abdominal breathing, ujjayi breathing, Nadi shudhi, Brahmari, and Udgeeth or chanting and remaining seated in silence will calm down body and mind and help alleviate the symptoms of nausea. Remember this is a temporary phase. Almost every woman gets over this. Stay positive and cheerful to the life growing within you.