If you experience any new pains, swelling, new symptoms or redness, be sure you contact your doctor immediately. Some warnings may not be documented and will not be listed here. If you are experiencing symptoms unlisted here but you believe these phones be linked to your use of medicines, go ahead and speak to your doctor immediately and advise him of potential unwanted side effects you may be experiencing. This free monthly calendar tracks your cycle in a very quick and simple way. All you have to do is type in the date of your respective last period and the calendar does the remainder. Everything is color coded for simple viewing. Green displays fertile days, blue may be the present day, and red occurs when you are expected to get a period. This is all based on the cycle length and the date of the first period which you entered. Identical twins are derived from an individual egg that is fertilized by one sperm. For unknown reasons, the fertilized egg splits into several embryos in the first stage of development. Some identical twins share the identical placenta. However, they often grow within separate amniotic sacs within the uterus. In rare cases, identical twins share one amniotic sac (monoamniotic). Langer-Giedion Syndrome can be a true contiguous gene deletion syndrome a result of deletions in the the TRPS and EXT1 genes. The lack of a functional EXT1 gene causes the bone exostoses, bone anomalies and facial abnormalities which can be affecting patients. The EXT1 gene as well as the TRPS1 gene are both absent in patients and research suggests that other genes based in the 8q24.11-8q24.13 region of chromosome 8 might be deleted or non-functional also. Longer deletions in this region are seen as mental retardation as well as the other variations in symptoms stated earlier.