This is a difficult question to answer due to the limited research in this area. However, pregnancy can be highly demanding of the body and good nutrition is important for optimal health. Your body does need additional protein during pregnancy and our advice would be the addition of around 0.5grams of protein per pound of body weight.
It's important to note, however, that we would never recommend using protein powder as a meal replacement during pregnancy, but as an additional supplement to normal meals. Additional food intake can provide additional protein requirements during pregnancy, however, if you have trouble eating enough protein, then protein powder may be useful in moderation.
However, it is always best to consult a doctor or a registered dietitian before consuming protein powder or any other supplement during pregnancy. Some protein powders may contain ingredients that are not recommended for pregnant women, and excessive consumption of protein can also have negative health effects. It's important to ensure that the protein needs are met through a balanced diet that includes food sources of protein, rather than relying solely on supplements.