Name : Vaibhav Sharma
Date of Birth : 31-71973
Time of Birth : 10:20 Hrs (IST)
Place of Birth : Bulandshahar (India)
Query :  I have one son of 7 years age & i am trying for second issue for last 4 years but unsucessful. Kindly let me know if at all there is yog for second issue & when? Thanks in advance & my best regards to you,- vaibhav

According to Vedic astrology, my observations are as follows:
1. Virgo ascendant and lord is placed in its own house of profession and is retrograde. Ascendant house is afflicted by Saturn, and afflicting Mahadasha lord Moon in the house of bedroom pleasures.
2. Second child house is afflicted by Saturn. But Saturn is lord of house of progeny, so initializing process for second issue.
3. You are passing through Mahadasha of Moon and Anterdasha of  Venus combust, indicates that events are on, but due to affliction by Saturn on Mahadasha lord and Anterdasha lord, this event is not happening.
For confirmation of the event I had not checked Saptansha chart etc.
Dasha is favorable, but affliction from Saturn is cause of concern, according to your chart.
Second house lord Jupiter is retrograde and afflicted by Sun.
To check further, detailed study of saptansha chart and spouse with child has to be done.