Ukususela kumzuzwana we-ovulation, iqanda lihamba lisuka kwi-follicle ye-ovari, ukusuka apho yaphuma khona, ukuya kwinqanaba le-uterine. Endaweni apho iqanda lishiya i-ovary, ihlala ephuzi emzimbeni , obonelela ukulungiswa kwe-endometrium yesibeleko kwisigaba sesibini somjikelezo kunye nokuqhotyoshelweyo kweqanda elichumayo. Kwaye ngokuqala kokukhulelwa, kuvelisa i-progesterone, efunekayo kude kube neveki ezili-16 zokukhulelwa, de kube umsebenzi we-yellow body uthatha kwi-placenta.
Kwaye iqanda lidlula emzimbeni wesisu, lifakwe yi-fimbria ye-tube ye-uterine kwaye ihamba kunye ne-lumen yayo kwisibeletho. Kwinqanaba elincinane le-tube, linokuhlangabezana ne-spermatozoon, ukuchumisa kwenzeka ngokubunjwa kwe-zygote.
Kwiintsuku ezimbalwa i-zygote yahlula, kwaye i-blastocyst, eneentlobo ezimbini zeeseli, ifika kwisibeleko ngosuku lwesithupha emva kokukhulelwe.
Uluhlu lwangaphakathi lweseli okanye i-embryoblast yilapho i-embryo iyakhiwa khona, kwaye ungqimba lwangaphandle luyi trophoblast oluya kubangela iimbumba kunye ne-placenta. Nguye oza kuba noxanduva lokufakela umbungu kwi-uterine cavity.
Iimpawu ze-attachment embryo kwisibeleko
I-Endometrium yesibeleko ekuqaleni kokukhulelwa ilungele ukufakela i-blastocysts-iqokelela i-lipids kunye ne-glycogen, iyancipha inkqubela yayo. Ixesha eliqhelekileyo lokuxhumeka kwembumbulu kwisibeleko yiintsuku eziyi-8 ukuya ku-14 ukususela ekuqalekeni kwe-ovulation. Kwinqanaba lokuqhotyoshelweyo, i-endometrium iyaba yindawo ehlala kuyo kwaye ibonakaliswe yi-trophoblast engena kuyo (i-reaction response). Ngenxa yalo monakalo, ukuphuma kwegazi kungenzeka. Ngoko ke, xa iimbungu zifakwe kwisibeleko,
Ezinye iimpawu zokubambisana kwebriyo kwisibeleko zincinci ezincinci ezithintekayo kwisisu esisezantsi, ukwanda kweqondo lokushisa komzimba ukuya kuma-37-37.9 degrees (kodwa akukho mzekelo uphezulu kunama-38). Ubuthakathaka obuninzi, ukucaphuka, ukukhathala, ukuvuna okanye ukubetha kwintsholongwane nako kunokwenzeka. Imvakalelo yowesifazane ngexesha lokuncediswa kwebriyo kwisibeleko kufana nalabo ngaphambi kwenyanga, kodwa emva komhla emva kokufakelwa kwimbungu egazini kuya kubonakala i-chorionic gonadotropin, kwaye uvavanyo lokukhulelwa luqala ukubonisa ukuba ayiyi kubakho inyanga zonke, kwaye isibeleko sikhula imbryo.