Authors:
Lenton EA. Weston GA. Cooke ID.
Title:
Problems in using basal body temperature recordings in an infertility clinic
Source:
BMJ. 1(6064):803-5, 1977 Mar 26.
Abstract:
Basal body temperature recordings are extensively used to diagnose and treat infertility, but too great an emphasis on the interpretation of these charts might be counter-productive in managing these patients. Several gynaecologists who use temperature charts clinically were asked to score 60 charts taken from a selection of normal and infertile women, and their results were compared with those obtained by a group of non-experts. Since the full hormonal profiles had been obtained for each of the 60 charts the accuracy of the predictions could be assessed. About 80% of the temperature charts were correctly interpreted by both groups as being either ovulatory or anovulatory but the day of ovulation was predicted correctly for only about 34% of the charts. When the charts were examined retrospectively the thermal nadir was found to coincide with the luteinising hormone surge in 43% of the charts from normal subjects but in only 25% of those from the infertile patients. Predicting the day of ovulation from the temperature recording, particularly in infertile women, is clearly unjustified.
Please click on the required question.
- 1 What is infertility?
- 2 How prevalent are infertility problems?
- 3 What are the main causes of infertility?
- 4 What are the objectives of our infertility investigations?
- 5 Have there been any noticeable changes in fertility requirements in recent years?
- 6 What is the effect of our age on fertility?
- 7 I smoke cigarettes. Can this have an effect on my fertility?
- 8 Does my weight influence fertility?
- 8A Obesity! How can I lose weight?
- 9 I have fibroids. Could these reduce my fertility?
- 10 I have been told that my womb has an abnormal shape and that was the way that I was born. Could this reduce my fertility?
- 11 I have endometriosis. Could this reduce my fertility?
- 12 I have been told that I have cervicitis or a cervical ectopy (erosion). Could this impair my fertility?
- 13 My doctor tells me that my womb is retroverted (tilts backwards). Could this reduce my fertility?
- 14 I have had an ectopic pregnancy. Does this affect my future fertility?
- 15 We are worried that we may have a fertility problem. What should we do?
- 16 How will our doctor be able to identify the cause of our infertility?
- 17 How can we tell if I am releasing my eggs (ovulating)?
- 18 Investigations have shown that I have a problem releasing my eggs (anovulation). What could be the cause of this?
- 19 How important are my Fallopian tubes in fertility?
- 20 How can we tell if my Fallopian tubes are functioning?
- 21a What are the causes of male factor infertility?
- 21 How can we assess male fertility?
- 22 What is the purpose of a post-coital test (PCT)?
- 23 We have had our infertility investigations and our problem remains unexplained. How can this be?
- 24 What are our chances of achieving a pregnancy?
- 25 Where can I obtain more information?
- 26 Could we have some recommended infertility support groups?
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