There have been a number of studies on estrogen and weight gain and estrogen is believed not to increase weight. Many women do gain weight and believe it is due to estrogen, but the studies don't support it.Some increase in breast size and some fluid retention do happen. Having your ovaries out can also affect your thyroid hormone levels and that can cause weight gain. Ask your doctor to check your thyroid levels.here have been a number of studies on estrogen and weight gain and estrogen is believed not to increase weight. Many women do gain weight and believe it is due to estrogen, but the studies don't support it. Some increase in breast size and some fluid retention do happen.
Owners should familiarize themselves with these factors so they give their Chihuahua the longest, fullest life possible. There's no fool-proof method for predicting exactly how long they can live, but current data suggests that Chihuahuas live an average of 15 to 20 years when properly cared for by a loving owner.
Dogs under 30 pounds live longer than the bigger breeds. Mutts tend to live longer than pure breeds, more diversity in the gene pool. The Great Dane and Deerhounds have the shortest. They are elderly around 6 to 8 years old, (giant breeds). Why large breeds die younger, appears to be mostly because they grow rapidly, therefore aging more rapidly. Your Chihuahuas Lifespan does depend on some external factors as well as the gender and genetic makeup. Females tend to live longer than males. Here is a list of factors that affect your Chis lifespan. 1  Genetics. 2  Type of diet. 3  Treats. 4  Vaccines. 5  Indoor/outdoor Dog. 6  Restrained or loose in the car with you.