Yes, it is possible to become pregnant during the climacteric. The climacteric is a period of transition between the fertile years of the woman and the menopause. During this period, the menstrual cycles are irregular as a consequence of the decrease of the eggs released in each cycle and the hormonal changes.
Although it is well less likely a woman become pregnant in the climacteric this it's possible, especially if the woman still has her menstrual cycles and has sex actively.
After 1 year without any menstruation, ie with the actual entry into menopause, the woman will no longer have a chance to conceive naturally.
If the woman in the climacteric does not want to get pregnant, she should use some form of contraception to prevent pregnancy until the menopause.
The climacteric is a special phase in the life of women, and each woman may have a different experience. Therefore, a medical evaluation is important for possible therapeutic supports that can minimize unwanted symptoms and facilitate the transition period until the onset of menopause.
