Well without actually seeing the chart it's hard to comment. Everyone not just Leo has the 'potential' for being great parents, it doesn't mean to say they will be though. Say for example they have Pluto in 5th conjunct moon, they will be emotionally controlling, manipulative, overpowering and domineering. In another example to have Saturn in 5th conjunct moon, suggests someone emotionally reserved, retarded who may not want children, or may never have children. May never be able to express their emotional nature properly and be very cold with children.
Playing devil's advocat here --
You need to understand there is far far more to astrology than just ‘sun signs’ firstly there are 10planets in the sky and 12houses and any one of these 10planets can be in any one of these 12 houses – so there’s 144 possible combinations there –
What is vitally important is your ‘time of birth’ and nearest town and then go to free website like astro.com to calculate your natal chart, you may have to reduce the image in Extended chart selection to 63% save to your hard drive, then upload here.
You need to post your chart in Western reading forum, you can get this free very easily from
www.astro.com. You may have to reduce the image to 63% in Extended chart selection