怀孕是我们一生中比较重要的事情,准妈妈会做足一切准备来迎接小宝宝的到来。那么,只有医生才能推算出预产期吗?自己不可以么?下面我们就一起来看下预产期的推算方法有哪些:月经逆算法这是最普通的计算方法。以280天(40周)为依据来逆算,则最后一次月经来临当天的月份上加9(或减3),再于日期上加7,即可算出。例如:最后一次月经来临的日期为1月15日,则1加9等于10,15加上7等于22,预产期即为10月22日。又如最后一次月经来临为9月25日,则9减3等于6,25加7等于32,预产期 Pregnancy is more important thing in our life, mothers will do everything to prepare for the arrival of the baby. So, only the doctor can calculate the expected date of birth? You can not? Now let’s look at the estimated date of the expected date of what: menstrual reverse algorithm This is the most common method of calculation. To 280 days (40 weeks) as the basis for the inverse calculation, then the last menstruation on the day of the month plus 9 (or minus 3), and then add 7 on the date can be calculated. For example: the date of the last menstruation is January 15, then 1 plus 9 is equal to 10,15 plus 7 is equal to 22, the expected date is October 22. Another example is the last time menstruation is September 25, then 9 minus 3 is equal to 6,25 plus 7 is equal to 32, the expected date