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Referral and Fertility Facts

  • For fertile women aged 35 years or younger, about
    • 60% will have conceived after 6 months
    • 80% after 12 months, and
    • 95% after 24 months.
  • A normal fertility rate is achieved with intercourse every couple of days during the most fertile time of the menstrual cycle.
  • Smoking halves pregnancy rates.
  • Being overweight or underweight can affect ovulation and reduce response to fertility drugs.
  • High alcohol or caffeine intake may reduce fertility.

Check:

  • Female rubella status
  • Taking Folic Acid
  • Weight gain if anovulatory
  • Occupational history
  • Drug history
  • Cervical smear history

Advice:

  • Weight loss if BMI more than 28
  • Stop smoking
  • Minimal alcohol and caffeine intake
  • Regular intercourse (2-3 times a week)
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What to order

Wondering what to order before referring your patient to Sunfert?

Investigation:

  • Progesterone 6 - 8 days before menses
  • FSH and Estrad. day 2 - 4 of cycle
  • Semen analysis – repeat in 4 - 6 weeks unless totally normal
  • Prolactin and thyroid function ONLY if irregular cycles
  • AMH Test – to check Ovarian Reserve

Further investigation for public referral:

  • Laparoscopy if duration more than 1 year, unless severe ovulation or severe sperm factor
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When to refer

Refer when:

  • No pregnancy and Biological Clock indicates status indicates the Think Or Act section, OR
  • Any abnormal results on investigation
  • Or if you patient is worried

Early referral if:

  • Extreme anxiety about fertility
  • Woman aged 35 years or older
  • Irregular cycles or anovulation
  • Severe sperm factor
  • Previous abdo/pelvic/urogenital surgery
  • Previous STD
  • Two or more consecutive miscarriages
  • Abnormal pelvic/genital examination (woman or man)
  • Family history of menopause between 40-45 years or earlier
  • Significant systemic illness
  • Genetic conditions (e.g. cystic fibrosis, muscular dystrophy or Huntington’s disease)

Immediate referral before starting cancer treatment

  • Sperm, eggs, ovarian tissue or testicular tissue stored before starting cancer treatment.
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AMH test

Anti-Müllerian Hormone (AMH) test

For most women, age best predicts the chance of conception each month. However, despite having regular menstrual cycles and normal periods, about 10% of women lose their fertility sooner than expected. These women should think about having a family in their 20’s or very early 30’s.

The AMH test is considered the best test currently available to estimate ovarian reserve.

  • This test is more convenient and less expensive than alternative tests because it uses a simple blood test rather than ultrasound scanning, and can be done at any time in the menstrual cycle.
  • It can help predict how many eggs you are likely to obtain in an IVF cycle.
  • It may also identify women who may undergo early menopause, and therefore who may
    lose their fertility earlier than average.
  • Although an AMH test can help pick up those who might lose their fertility more quickly, it cannot show who is more fertile than average, nor does it predict ovarian reserve in women with Polycystic Ovaries (PCO).

Important points

Please remember that age is still a very important factor for fertility. The AMH tests can suggest when a women might have lower fertility than expected for her age. However, there is no evidence that ‘good’ AMH results mean that women have a higher fertility than expected for their age.

  • We strongly recommend all women start their family well before 40 years of age.
  • A normal AMH result does not exclude other possible causes of reduced fertility.

Graph of Anti-Müllerian Hormone (AMH) Levels

The graph shows the average AMH level for women without fertility problems according to age (the dark line) and the 10th, 25th and 75th centiles for this group of women.

Amh image

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The Biological Clock

This tool indicates:

  • Natural conception per month if you have no fertility issues
  • IVF success rate at the same age
  • When to seek help after months of unsuccessful attempts

If you are concerned at any stage – we recommend booking a doctor appointment or a free nurse consultation. The sooner you make a plan the better your chances in the long term.

When to seek advice early

  • If you have polycystic ovaries, endometriosis, or have been through a cancer diagnosis; we recommend you get in touch quickly so we can talk you through all your options and give you the greatest possible chance of success.
  • If you’re a single woman considering motherhood in the future; it’s best to approach us early and consider egg freezing as this can be an option for you while you have a higher ovarian reserve and healthier eggs.
Set your age and the months you’ve been trying to conceive
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Your chance of having a baby per month for fertile couples
Your chance of having a baby per IVF cycle (if experiencing infertility)

Body Mass Index calculator

Being overweight or underweight can reduce fertility, so it is important to keep your body weight within the normal healthy range.

Body Mass Index (BMI) is an indication of your body weight and can be calculated by dividing weight by height. You should aim for a BMI of between 20 and 25, as this will optimise your chances of conception.

Woman’s BMI below 19

Even in these modern times, nature knows best. If a woman's BMI falls below 19, the body senses famine and ovulation is switched off to prevent the risk of having a baby with malnutrition. Excessive exercise can reduce body fat and increase muscle mass to a point where periods cease for the same reason. Risk of miscarriage is also increased in women with a low BMI.

Being underweight

If a woman's BMI falls below 19, the body senses famine and ovulation is switched off to prevent the risk of having a baby with malnutrition. Excessive exercise can reduce body fat and increase muscle mass to a point where periods cease for the same reason. Risk of miscarriage is also increased in women with a low BMI.

BMI’s greater than 30

This can reduce fertility by 50%. Pregnancy for women with a 30+ BMI is often associated with problems such as maternal diabetes, high blood pressure, big babies and increased risk of caesarean section.

Add your height and weight to calculate your BMI