is the best time to conceive?
For a healthy woman of childbearing age to conceive
a baby, ovulation must take place. During ovulation, an egg is released from
the ovary of the woman and it is this egg which is fertilised by the male sperm
Regardless of the length of the menstrual cycle,
ovulation usually occurs 14 days before the next period is due. Therefore, the
most fertile time of the month for a woman who has a 28 day cycle is this mid-cycle
Intercourse at this time and during the three days
either side of ovulation provides the ideal conditions for a pregnancy to take
is the usual menstrual cycle?
The usual menstrual cycle lasts for 28 days. However,
cycles can vary considerably. Some women may have regular five week cycles;
others may find that the number of days can vary from month to month. Women
may experience menstrual cycles of anything from 20 to 40 days.
For women who have regular periods it is straightforward
to work out the most fertile time of the month. Ovulation will take place on
day 14 of a 28-day cycle and the woman will remain fertile from roughly day
11 to day 17. For women with a five week cycle, ovulation is likely to take
place on day 21.
The unfertilised ovum, or egg, can only survive
for about 12 hours. If it is not fertilised by the male sperm within this time,
it will die and will be absorbed by the cells lining the fallopian tubes.
However, male sperm can live in the female genital
tract for up to 72 hours, so the very best time for a woman to have sexual intercourse
if she wants to become pregnant is between day 11 and day 14 of a normal 28-day
if I have irregular periods?
In a woman with a 28-day cycle, given the timing
of ovulation and the lifespan of a male sperm, we can estimate that she is likely
to become pregnant if intercourse takes place between day 8 and day 18 of her
cycle. Conversely, she is unlikely to become pregnant if intercourse takes place
during the first 8 days or the last 10 days of her cycle. However, this is a
very inexact science
For women with irregular periods, working out the
best time to get pregnant can be difficult. It is important to note that using
the safe period as a method of contraception is likely to prove
very unreliable indeed for these women. The principle underlying the so-called
safe period or the rhythm method of contraception is that women
have a regular menstrual cycle.
In order to work out the most fertile time or the
good days for becoming pregnant, a woman needs to have some regularity
in her menstrual cycle.
A woman who has very irregular periods may need
to visit her GP for further advice on the best time to conceive. Both the woman
and her partner may be referred to a fertility clinic for investigation and
advice, particularly if they are having serious difficulty in becoming pregnant.
Couples who are having difficulty conceiving may
be advised to keep a temperature chart or use an ovulation kit. The body temperature
rises very slightly (about 0.20C after ovulation). Therefore, careful
monitoring of the body temperature with a special thermometer and chart will
usually demonstrate if and when ovulation is occurring. A blood test for progesterone
levels on Day 21 of the cycle will also help to confirm ovulation. Ovulation
kits measure the levels of different hormones in the urine and can help to predict
other factors affect fertility?
Many factors can affect fertility. In couples who
are undergoing investigation and treatment for fertility problems, all the following
factors will be looked at:
Smoking is a major factor in infertility. Any couple
who are hoping to conceive a healthy baby should consider giving up smoking,
or should gradually reduce their intake of nicotine, before embarking on trying
to become pregnant.
Fertility in the woman begins to decline after
the age of 30, and becomes quite marked after the age of 35, making it much
more difficult for her to become pregnant. However, there is a strange phenomenon
loosely referred as the last fling of the ovary which can occur
in women in their forties and is known to have resulted in many an unexpected
Frequency of intercourse:
The ease with which a woman becomes pregnant is
usually related directly to how often she has intercourse. If sexual intercourse
takes place four times a week, then live male sperm will always be present in
the outer part of the female Fallopian tube waiting to be fertilised. Provided
the woman is ovulating on a regular basis, one of the male sperm is certain
to link up with the ovum sooner or later. On the other hand, if a couple are
only having sex once a week, the exact date of ovulation may be missed for several
consecutive months, or even years.
Factors such as stress, strain, overwork, tiredness,
major fluctuations in weight; obesity; illness etc can all take their toll on
the fertility of both partners in a relationship. In today's
high-pressure Ireland, with so many couples both in demanding full-time jobs,
these are very real issues to contend with.
The vast majority of fit and healthy couples who
are engaging in sexual intercourse on a regular basis without contraception
are likely achieve pregnancy within a year provided there are no underlying
factors affecting fertility in either partner.
It is equally possible to become pregnant the first
time you try!
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