It is safe to eat Kai lan during pregnancy.
Kai lan is very rich in vitamin C which can help to improve immune system of the expecting mother.
Kai lan is also rich in calcium which is important for bone development of the fetus.
Furthermore, dietary fiber in Kai lan can help to prevent constipation. Due to hormonal change, it is often for pregnant women to experience constipation. Natural dietary fiber in Kai lan can aid the expecting mothers in fighting constipation.
Please do not eat this vegetable together with fruit like pear, oranges, grape and apple as it may cause discomfort to thyroid. Furthermore, you may want to wash this vegetable with slightly warm water to dissolve any residue of chemical or pesticide that may be left on the leaves.