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.
Toy breed dogs (like Chihuahuas and Yorkshire Terriers) generally reach their full size between 10 months and 1 year. Small to medium sized dogs (like Beagles and Basenjis) will reach their final height between 12 and 15 months, and their final weight by 18 months. Medium and large breed dogs (like Collies and Golden Retrievers) are full grown by around 18 months, and reach their final weight at around 2 years.