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Rhythm Method may kill more embryos than other methods of birth control.
The New Scientist article.
The original article in the Journal of Medical Ethics.
The New Scientist article.
The original article in the Journal of Medical Ethics.
Just found an interesting article when looking up info about penguins mating for life. Apparently, some penguins do, but most only pair for the mating season with 70-90% finding new mates for the next year.
From an article in the UK Guardian:
Yours faithfully... up to a point
Monogamy is one of the rarest behaviours in nature, writes Olivia Judson
Thursday August 22, 2002
Thirty years ago, biologists thought monogamy - as in 'til-death-do-us-part monogamy - was common in nature.
Some 90% of bird species were believed to be monogamous, at least for the duration of a breeding season, and many were thought to mate for life. Wolves and gibbons were similarly admired. But that was before the invention of genetic paternity testing, which revealed the truth about who was really having whose children.
During the 1980s and 90s, the supposedly virtuous came tumbling from their pedestals. These days, when animals live together in pairs, they are said to be socially monogamous, a cautious term that risks no assumptions about their sex lives.
The discovery of true monogamy throughout a population - even for just one breeding season - is rare and exciting news.
For more, see the article.
From an article in the UK Guardian:
Yours faithfully... up to a point
Monogamy is one of the rarest behaviours in nature, writes Olivia Judson
Thursday August 22, 2002
Thirty years ago, biologists thought monogamy - as in 'til-death-do-us-part monogamy - was common in nature.
Some 90% of bird species were believed to be monogamous, at least for the duration of a breeding season, and many were thought to mate for life. Wolves and gibbons were similarly admired. But that was before the invention of genetic paternity testing, which revealed the truth about who was really having whose children.
During the 1980s and 90s, the supposedly virtuous came tumbling from their pedestals. These days, when animals live together in pairs, they are said to be socially monogamous, a cautious term that risks no assumptions about their sex lives.
The discovery of true monogamy throughout a population - even for just one breeding season - is rare and exciting news.
For more, see the article.
.
