Later symptoms include amenorrhea, an absence of a normal menstrual cycle, even after a period of lactation, which is due to a lack of luteinizing hormone and follicle stimulating hormone.

晚期的症状包括闭经，即月经周期不正常，甚至就在哺乳期后出现，这是由于缺乏黄体生成素和卵泡刺激素。

Bulimia can also lead to endocrine changes, the most common of which is menstrual irregularities in women, who might even develop amenorrhea, where either the normal menstrual cycle stops or menstruation doesn't start by age 15.

暴食症也可导致内分泌异常，最常见的是女性的月经失调，甚至会发展成闭经，即月经周期全部停止或15岁仍无月经初潮。

On average, the menstrual cycles of people who were vaccinated varied in length by less than one day, which is interesting but not medically significant since normal menstrual cycles vary by up to seven days each cycle.

平均而言，接种疫苗的人的月经周期长度变化不到 1 天，这很有趣，但没有医学意义， 因为正常的月经周期每个周期最多变化 7 天。