Download Biomedicine and the Human Condition: Challenges, Risks, and by Michael G. Sargent PDF

By Michael G. Sargent

ISBN-10: 0521541484

ISBN-13: 9780521541480

The right way to stay away from disorder, tips to breed effectively, and the way to dwell to an affordable age are questions that experience at a loss for words humankind all through historical past. This e-book explores our development in knowing those demanding situations, and the hazards and rewards of devising options. A extensive variety of subject matters are lined, together with replica, the improvement of human progeny from notion to maturity, staying fit, aging, melanoma, an infection and the weight of our genetic legacy.

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Normally, the uterus is prepared for a pregnancy in each menstrual cycle by the hormones oestrogen and progesterone, which are secreted by the ovary when the egg is released. Edwards and Steptoe reasoned that the uterus of the waiting mother must be prepared in the same way by exposure to these hormones in order to ensure successful implantation. At various landmark stages in the project, progress was reported in scientific papers to The Lancet and Nature, signalling unambiguously the intention of eventually performing IVF.

They seemed to be living in a harmonious equilibrium with their harsh environment – healthy, long-lived, and by no means struggling to find enough food, but reproducing very slowly. Their babies were breast-fed for more than three years, with intervals between births of more than four years; each mother had only four or five children in a lifetime. Kung girls did not start menstruating until their fifteenth year, and their first child was not born before their nineteenth, providing a brake on the population growth rate.

The earliest human literary artefacts (Genesis 35:17, 39:28; Exodus 1:15–21) indicate the existence of midwives and the need of women for companionship at birth. Anthropologists argue that historically, the menopause protected women from death in childbirth and thereby conferred an important evolutionary advantage on the family unit by facilitating her survival as grandmother. 35 Recent investigations of pre-twentieth-century family histories indicate that children whose grandmothers assisted in their upbringing had more descendants than those without.

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