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.
Chihauhuas are normally referred to as the breed with the longest lifespan. They average 15-20 years and are one of the smallest dog breeds. The oldest Chihuahua on record 1, Megabyte, died at the age of 20 years and 265 days.The Australian Cattle Dog is known for having one of the longest life expectancies.There are records of Australian Cattle Dogs living past 20 years old.esearch shows that larger dogs live for a shorter period of time when compared to smaller ones. For example, an Irish Wolfhound (average 115 lbs) has an average lifespan of 7 years, while a Jack Russell Terrier (average 15 lbs) can live up to 13-16 years.