Suggest three reasons why the percentages are so much higher in Sub-Saharan Africa.

education on HIV / AIDS less effective;

sexual attitudes / number of partners ;

availability of condoms ;

poverty / poorer / less money ;

sex industry ;

less primary health care / less likely to be diagnosed

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scientists have discovered that hiv does not cause aids by the virus's direct effect on the host's immune cells, but rather through the cells' lethal influence on one another. researchers from the gladstone institutes have revealed that hiv does not cause aids by the virus's

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.