The proposed work is the conception of a novel intra-body sensor device capable of measuring and gathering long-term intra-vaginal pH and temperature. At its early stage this project focuses on the analysis of different design concepts and operation principles of such intra vaginal sensor device. Traditional methods of intra-vaginal pH sampling, which rely on analysis of vaginal secretions or discharge from lateral vaginal walls, are difficult in long-term and often fraught with the potential for errors. Therefore this paper focuses on the analysis of such sensor's shape, form, size and fabric in order to enable precise, continuous acquisition of females' and animals' intra-vaginal pH and temperature at the right place inside the vagina. The aim is to set such operation principles, which will enable convenient collection and analysis of continuous vaginal pH and temperature samples for the purpose of further study. The objective is to achieve at least as accurate results as with the discrete analysis of clinicallyobtained intra-vaginal specimens, if not better. The data obtained with such sensors could enable a development of insemination prediction and gynaecological disorders detection models, which deployed to, for example smartphone devices, will help to attain high conception rate for animals and eventually improve the control of the vaginal health for women.