The investigators are investigating the effect of oestrogen and oestrogen loss on the lungs. This is important to because lung diseases are a growing problem globally. In people suffering from Asthma and chronic obstructive pulmonary disease (COPD), women are more likely to die from lung disease than men. The researchers believe this global difference is due to sex hormones. Women have more oestrogen than men. Other studies have shown that oestrogen affects the lungs through the immune system. The researchers want to know the effect that oestrogen has on the lungs in people suffering from Asthma and COPD by comparing this to people with no lung disease. The researchers are also particularly interested in what happens at the point where women lose oestrogen naturally, which is the menopause. They want to understand the effect of oestrogen in younger women and compare this to women who have experienced the menopause. This is an observational study. Therefore, the participants will have a baseline visit and another subsequent visit (or multiple visits which are optional) and the researchers will compare the changes in their oestrogen levels, lung function and immune system response. To understand the differences mentioned above in the body we require samples and questionnaires to be filled out at face-to-face visits. All participants will be given the opportunity to opt into different streams of visits which vary between 12 months and 24 months.
