As per your chart, you are blessed with the happiness of progeny, however there could be some delay and may seen professional medical advice.
The chart analysis of the partner also gives additional insights in to conception. You need to avoid spicy food which can cause hormonal disturbances, keep your body cool. You can practice meditation and yoga to relieve any existing stressful conditions.
You may also may take professional advice on the diet regimen from a Nutritionist, which you should be following.
Tula Lagna with the Lagna lord Venus posited in the sixth house in exaltation and conjunct Mercury; Ketu posited in the Lagna and Fifth lord Saturn retrograde and posited in the second house conjunct a debilitated Moon; Sun posited in the fifth house.