Electrology is the practice of using electricity to remove unwanted hairs. With electrology there are two methods that are mainly used: galvanic and thermolysis. The galvanic method is unsafe to use during pregnancy; the thermolysis method may be safe to use.
Some women have excessive body hair before they become pregnant and others develop the trait after pregnancy.
Bikini waxing in pregnancy is usually safe but could be associated with some pain. It is suggested that if you are planning to continue waxing through the entire pregnancy, to begin in the early months.
The general census is that depilatories/hair removers such as Veet or Nair are safe if used as directed and to limit the amount of time the product is on the skin.