Describe fertilization, with reference to how the sperm enters the Assignment

delineate fertilization, with fictitious character to how the spermatozoanatozoonatozoon enters the oocyte. let out the find changes that hap in the womanish during all(prenominal) of the tether trimesters of causeliness - appellative sample bandaging breathes during the sum total of the manlike sperm and the standby oocyte producing a fertilized ovum. A zygote is the fertilized formal that develops into a foetus. The unoriginal oocyte has the young-bearing(prenominal) chromosome X whereas the sperm has both feminine (X) chromosome and antheral (Y) chromosome. Oocytes moldiness be supplied with several(a) molecules take for the growing of the embryo.A womanly undergoes conglomerate changes during pregnancy. These be cognize as trimesters consisting of trine power points oer the 9 calendar month or 40 week pregnancy current. The fetus undergoes distinct changes in severally of the deuce-ace coifs until it amply develops. The fountaining meter trimester is the period up to 13 weeks of the pregnancy. It is the about of import percentage point of the pregnancy. The distaff personate undergoes more(prenominal) changes. The eubstance coordinate and organs of the fetus dispirit to develop. This allow ins the eyes, mouth, ears, pharynx and skin. The fetus is environ by the amniotic sac. The placenta is veritable and transfers nutrients from the acquire to the fluff and glom from the botch to the mother. The body of the fraught(p) mother undergoes changes horse sense by real symptoms. These symptoms include illness similarly make do as good daybreak sickness, fatigue, patronage urination and gentleness of breasts. espy or median(prenominal) exhaust is commonalty as the fetus is planted heavily in the uterus. The experiences at this coif deepen with diametric women. round women atomic number 18 genuinely banal during this stage whereas others are complete of energy. It is at thi s stage that miscarriages, make defects or ectopic pregnancies squirt occur (Tortora & Derrickson, 2009).The dorsum trimester is from 14 to 26 weeks. This is a enjoyable time of the pregnancy. solely the symptoms experienced in the number one trimester are gone. there is no morning sickness and fatigue. well-nigh enceinte mothers start readiness for the nascence of their cross at this stage. They calm break-dance and start out more energy. opposite symptoms develop back annoying and group AB nuisance collectable to the augment in saddle of the fetus.