It has been said that the mother “loses a tooth for every baby”. There is no medical literature to support this statement. The loss of a tooth by a pregnant woman most likely reflects a continuation of her current state of dental health. It is possible that pregnancy gingivitis may sufficiently irritate the gums to make brushing and the routine dental care uncomfortable, and this may hasten the tooth decay. This tooth decay does not occur in most of the patients [14]. The main salivary changes in pregnancy involve its flow, composition, pH and hormone levels. Cross sectional studies have shown a reduced, whole stimulated salivary flow rate in pregnant women, but longitudinal studies have shown that there was no change in the whole stimulated salivary flow rate.The changes in the composition of the saliva include a decrease in the sodium concentration and pH, and an increase in the potassium, protein, and the oestrogen levels. Checking the salivary oestrogen level has been suggested as a screening test to detect the risk potential for a preterm labour [15]. The salivary oestrogen levels are higher in the women who are destined to have preterm babies than in women who have normal term deliveries. The salivary oestrogen increases the proliferation and desquamation of the oral mucosa and also an increase in the subgingival crevicular fluid levels. The desquamating cells provide a suitable environment for bacterial growth by providing nutrition, thus predisposing the pregnant women to dental caries [16].