▁system ▁of ▁less er ▁short - n osed ▁fruit ▁b ats ▁is ▁pol yg yn ous . ▁In ▁the ▁Philippines , ▁most ▁populations ▁give ▁birth ▁twice ▁a ▁year ▁and ▁pre gn ant ▁females ▁have ▁been ▁found ▁in ▁almost ▁all ▁months . ▁ ▁The ▁period ▁of ▁gest ation ▁is ▁approximately ▁ 3 . 5 ▁to ▁ 4 ▁months . ▁The ▁mother ▁n urs es ▁the ▁young ▁with ▁milk ▁for ▁about ▁six ▁to ▁eight ▁weeks . ▁It ▁takes ▁about ▁a ▁year ▁for ▁the ▁male ▁to ▁become ▁sex ually ▁m ature , ▁and ▁most ▁females ▁become ▁pre gn ant ▁at ▁approximately ▁six ▁to ▁eight ▁months ▁of ▁age . ▁Med way ▁observed ▁that ▁bre eding ▁was ▁non - season al ▁in ▁Pen ins ular ▁Malays ia ▁and ▁that ▁a ▁single ▁young ▁was ▁produced ▁and ▁carried ▁by ▁the ▁female ▁during ▁the ▁early ▁stage ▁of ▁its ▁life . ▁Bre eding ▁is ▁also ▁non - season al ▁in ▁Th ailand . ▁Most ▁pre gn an cies ▁occur ▁from ▁March ▁to ▁June ▁with ▁pe aks ▁in ▁January ▁and ▁September . ▁L act ation ▁corresponds ▁with ▁the ▁peak ▁of ▁the ▁ra iny ▁season ▁as ▁well ▁as ▁the ▁fruit ing ▁season . ▁Both ▁sex es ▁take ▁care ▁of ▁the ▁young . ▁M ales ▁play ▁an ▁active ▁role ▁in ▁la ct ation ▁and ▁feed ing ▁the ▁young . ▁They ▁have ▁m amm ary ▁g lands ▁that ▁are ▁the ▁same ▁size ▁as ▁those ▁of ▁the ▁female ▁and ▁exceed ▁ 8 % ▁of ▁their ▁overall ▁body ▁mass . ▁ ▁Be havior ▁ ▁L esser ▁short -