Circumcision
Circumcision is very important to most branches of Judaism, with over 90% of male adherents having the procedure performed as a religious obligation. The basis for its observance is found in the Torah of the Hebrew Bible, in Genesis chapter 17, in which a covenant of circumcision is made with Abraham and his descendants. Jewish circumcision is part of the "brit milah" ritual, to be performed by a specialist ritual circumciser, a "mohel", on the eighth day of a newborn son's life, with certain exceptions for poor health. Jewish law requires that the circumcision leaves the glans bare when the penis is flaccid. Converts to Conservative and Orthodox Judaism must also be circumcised; those who are already circumcised undergo a symbolic circumcision ritual. Circumcision is not required by Judaism for one to be considered Jewish, but some adherents foresee serious negative spiritual consequences if it is neglected.
Prevalence of circumcision
The Australian Longitudinal Study of Health and Relationships is a computer assisted telephone interview of males aged 16–64 that uses a nationally representative population sample. In 2005 the interview found that the prevalence of circumcision in Australia was roughly 58%. Circumcision status was more common with males over 30 than males under 30, and more common with males who were born in Australia. 66% of males born in Australia were circumcised and less than 1/3 of males under 30 were circumcised. There has been a decline in the rate of infant circumcision in Australia. The Royal Australasian College of Physicians (RACP) estimated in 2010 that 10 to 20 percent of newborn boys are being circumcised, but the prevalence of male circumcision is much higher due to the presence of older circumcised males remaining in the population. Medicare Australia records show the number of males younger than six months that underwent circumcision dropped from 19,663 in 2007/08 to 6309 (4%) in 2016/17.