LMP (last menstrual period) Generally a pregnancy is dated from the first day of the last menstrual period (LMP). Women who have a regular 28 day menstrual cycle will usually ovulate and therefore conceive around day 14 (mid-cycle). The most important issue to clarify is the timing of the exposure in the pregnancy. Other factors that will determine whether or not a drug is a teratogen includeįor these reasons if you call MotherSafe you will be asked detailed questions about the exposure. Some agents may cause both structural and functional problems. methyl mercury) or radiation.īehavioural teratogens interfere with maturation and development of the embryo or fetus, resulting in functional problems such as deafness, visual loss or neuro-developmental delay. Although most recognised teratogens are drugs (prescribed or over-the-counter), they can be infections (e.g. Teratogens are environmental agents introduced during pregnancy that interfere with development so that they induce or increase the incidence of a congenital (structural) malformation or birth defect. In reality most women use some form of prescribed or non-prescribed medication during pregnancy and the vast majority of drugs are actually considered to be safe. There is a general belief that any exposure during pregnancy poses a potential risk to the developing baby. Pregnancy Planning, Lifestyle and Nutrition (PLaN).Find your local Drug Information Service.

Parking for antenatal and ultrasound appointments.Midwives Clinic and GP Shared Care (GPSC).Medical Complications of Pregnancy Clinic.Malabar Community Midwifery Link Service.

Information for General Practitioner (GP).

The Royal Hospital for Women(Side Menu for services)

All or none principle definition