Weight gain (temporary) and bloating are extremely common in the first several weeks of treatment. As your body gets used to hormone changes and balancing, it is common to experience water retention and bloating initially. But don’t be discouraged—you’ll start to lean out over time. Other side effects can include mood changes and nipple sensitivity. Remember, too, that we run blood tests at specific treatment intervals to evaluate levels in the contest of symptoms in order to minimize side effects.