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Sex in Australia: selected characteristics of regular sexual relationships.

OBJECTIVE:

To describe selected characteristics of Australian adults' regular or ongoing sexual relationships.

METHOD:

Computer-assisted telephone interviews were completed by a representative sample of 10,173 men and 9,134 women aged 16-59 years. The overall response rate was 73.1% (69.4% men, 77.6% women). Respondents indicated how often they had sex in the past four weeks, contraceptive use, their own and their partners' expectations about having sex with other people during their relationship, whether they had discussed these expectations with their partners and whether they had an explicit agreement about sex with other people.

RESULTS:

85.3% of men and 89.5% of women were in a regular heterosexual relationship, among whom 81.4% of men and 89.3% of women reported contraceptive use. Men and women who had a regular partner for the past 12 months had had sex with their partners an average of 1.84 times per week in the four weeks before interview; younger people had sex more often. Most respondents expected themselves and their partners to not have sex with other people, although men were less likely than women to have discussed these expectations with their partner. Bisexually identified men and women were significantly less likely than heterosexually identified men and women to support having sex only with their regular partner. Only 4.9% of men and 2.9% of women in regular heterosexual relationships had concurrent sexual partners in the past 12 months.

CONCLUSION:

Australians' attitudes to not having sex with people while in a regular relationship are highly consistent with their behaviour.

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The differential anti-proliferation effect of white (Pueraria mirifica), red (Butea superba), and black (Mucuna collettii) Kwao Krua plants on the growth of MCF-7 cells

The differential anti-proliferation effect of white (Pueraria mirifica), red (Butea superba) and black (Mucuna collettii) Kwao Krua plant extracts on the growth of MCF-7 cells was evaluated after 4 days of incubation. The percent cell growth comparison was based on protein determination of the harvested cells in parallel with the control group and Pueraria lobata treatment group. Pueraria lobata led to no proliferation and a mild anti-proliferation effect on the growth of MCF-7 cells. Pueraria mirifica caused proliferation at 1 µg/mL and an anti-proliferative effect on the growth of MCF-7 cells at 100 and 1000 µg/mL with an ED50 value of 642.83 µg/mL. Butea superba led to no proliferation and an anti-proliferation effect on the growth of MCF-7 cells at 10, 100 and 1000 µg/mL with an ED50 value of 370.91 µg/mL. Mucuna collettii led to no proliferation and an anti-proliferation effect on the growth of MCF-7 cells at 100 and 1000 µg/mL with an ED50 value of 85.36 µg/mL. The results demonstrated that only Pueraria mirifica showed an estrogenic effect on MCF-7 cell growth and a clear antagonistic effect with E2 at high concentration. Butea superba and Mucuna collettii exhibited only anti-proliferation effects on the growth of MCF-7 cells in relation with a possible anti-estrogen mechanism or a potent cytotoxic effect.

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