Your gyne­co­lo­gist or obstetri­ci­an will mea­su­re your pregnan­cy in tri­mes­ters star­ting from the first day of the mens­tru­al peri­od befo­re your con­cep­ti­on, for a total of 40 weeks. The first tri­mes­ter inclu­des the com­ple­te embryo­nic sta­ge and part of the fetus sta­ge up to week 12, appro­xi­mate­ly 3 mon­ths long. The second tri­mes­ter last until the 27^th […]