How pregnancy happens

HOW PREGNANCY BEGINS

In order to become pregnant, sperm has to meet an egg, fertilisation occurs and the resulting embryo must implant into the uterine wall under the influence of hormones which continue to nurture the pregnancy. Consequently, if there are any problems with the production of healthy sperm, eggs, hormones or the reproductive organs (namely the fallopian tubes and uterus) there is the potential for problems to occur.

Within a few days of fertilisation (sometimes called conception) the ball of cells (Blastula) attaches to the wall of the uterus (endometrium) ready for implantation. Human Chorionic Gonadotrophic Hormone (hCG) stimulates the corpus luteum (the empty egg sac) to produce progesterone to keep the lining of the womb nourished until the egg has safely implanted.

Following implantation the blastocyst (as it is now known) continues to secrete hCG. This forms the basis of the pregnancy test we know today and even tiny levels of this hormone if detected in urine, can confirm a pregnancy has occurred. *

We advise you to test again a few days later to confirm the result.

**Information compiled with the help of Sharon Trotter, independent midwife, www.sharontrotter.org.uk

For further information on pregnancy, you can go to www.firstresponse.com