Some more thoughts on the topic of fertility preservation raised by Dan in this thread

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It's important that if you have recently been diagnosed with a cancer problem, and you may wish to have one or more children in the future, that you inform your doctor and your medical team about your fertility needs, and if possible discuss fertility issues with your doctor and medical team before decisions are made about treatments for your cancer problem. Don't rely on them to bring the subject up - they may not do it as their first concern will be for your immediate health and safety.
Supporters can help by making sure fertility is on the list of items to be discussed, and perhaps even initiating a discussion if you're attending medical appointments.
There are two good reasons for discussing fertility matters before any treatment decisions are made. The first is that some treatments for cancers can lessen your fertility or even cause permanent infertility in some cases. But fortunately there are often different treatment options available so you and your medical team can choose treatments which maximise your chances of being fertile in the future. Treatments for many cancers can be delayed for a while until fertility issues have been addressed.
The second reason is that if you think your fertility is going to be impaired in the future either by the cancer itself or by the recommended treatments, you may want to consider the options of preserving embryos, or eggs, or sperm, or some other procedure that preserves reproductive cells or tissue for future use. Usually these procedures either need to be done or are best done before treatment starts.
The American Society of Clinical Oncology has recently published an important scientific paper called "American Society of Clinical Oncology Recommendations on Fertility Preservation in Cancer Patients" [the subject of the article Dan refers to above]. The paper is especially relevant to those who have been newly diagnosed with cancer who wish to retain their fertility, and for members of the medical profession who may be advising newly diagnosed patients on treatment regimes.
Here are some quotes from the paper:
"The purpose of this guideline is to review the literature pertaining to fertility preservation options for men, women, and children undergoing cancer treatment, and to give guidance to oncologists about these issues."
"RECOMMENDATIONS: As part of education and informed consent before cancer therapy, oncologists should address the possibility of infertility with patients treated during their reproductive years and be prepared to discuss possible fertility preservation options or refer appropriate and interested patients to reproductive specialists. Clinician judgment should be employed in the timing of raising this issue, but discussion at the earliest possible opportunity is encouraged. Sperm and embryo cryopreservation are considered standard practice and are widely available; other available fertility preservation methods should be considered investigational and be performed in centers with the necessary expertise."
"CONCLUSION: Fertility preservation is often possible in people undergoing treatment for cancer. To preserve the full range of options, fertility preservation approaches should be considered as early as possible during treatment planning."
The full text of the scientific paper can be found here
http://www.jco.org/cgi/content/full/24/18/2917 and a patient-friendly "ASCO Patient Guide: Fertility Preservation" can be found here
http://www.cancer.net/portal/site/patient/menuitem.169f5d85214941ccfd748f68ee37a01d/?vgnextoid=6a57ffdb060fa010VgnVCM100000ed730ad1RCRDI suggest browsing through the scientific paper whether or not you read the patient-friendly guide, even if you don't understand some of it - that way you get the information straight from the people who reviewed the scientific literature and prepared the guidelines.
The above is mostly quoted from my webpage
http://www.bestcancersites.com/fertility/ which I'm in the process of updating, where you can find _link_s to a variety of fertility-related websites.
For anyone who has low fertility either due directly to a cancer or due to cancer treatment, there are various options you can pursue. Reproductive technology has come a long way in recent years. Eg for men with extremely low viable sperm counts, I gather that individual viable sperm can be hunted down, captured, and injected into eggs (doubtless its not quite as simple as I've made it sound there).
And for anyone who has become infertile due to cancer and its treatment there may be options such as adoption to consider.
There will probably come a time when all general practitioners and other members of the medical profession who work at the front line of cancer diagnosis and treatment planning, have fertility needs on their checklist of topics to discuss at an early stage of consultations. From what I read, we are a long way from being there yet.
Maybe "regulars" (a word which always reminds me of people leaning on a bar at the local pub

) on these forums could keep an eye out for new members posting for the first time who've recently been diagnosed, and suggest they put fertility on their list of items to discuss with relevant member(s) of their medical team

.
Cheers,
Ed Everest.