Smoking causes the subsequent effects in a healthy person:
– Rise in blood pressure
– Increase in pulse rate
– Irregular heartbeat
– Reduced efficiency of red blood cells responsible for carrying oygen around the body; up to 15 per cent of them are subversed into carying the carbon monoxide produced by smoke
– decrease appetite
– stimulation or depression of nervous system, depending on mood..
Source: Charlish, A 2003, Getting pregnant: How to improve your chanced of a healthy conception, Mitchell Beazley, London, p. 38