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The Foetus Haemorrhoids often develop or worsen in pregnant patients. This may be due to the increased pressure of the womb, and this is often made worse by constipation. However, if drugs are to be used, external products are preferred because many drugs are readily absorbed from the rectum. Anal painkillers containing surface anaesthetics should be avoided because of possible absorption into the blood. And these may finally end up in the foetus. High blood pressure or hypertension affects the foetus as well. Hypertensive patients have a greater incidence of decreased foetal weight and foetal growth retardation due to decreased function of the placenta. Origin: The placenta develops from the chorion frondosum (foetal origin) and decidua basalis (maternal origin). Anatomy At Term: Shape: discoid. Diameter: 15-20 cm. Weight: 500 gm. Thickness: 2.5 cm at its centre and gradually tapers towards the periphery. Position: in the upper uterine segment (99.5%), either in the posterior surface (2/3) or the...

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