Most people have 3 - 4 planets retrograde in their birth horoscope. But not all planets give importance when they are retro in the birth chart. If personal planets are retrograde at birth they tend to affect the individual a lot. But if trans personal planets are retro, not so much on an individual level. The social planets stand somewhere in between.
If you have many personal planets retrograde you tend to have many retrograde lessons in your life. If you have mostly transpersonal and social retrogrades then you share some common themes with people of your generation. Personal planets
Sun Moon Mercury Venus Mars
Jupiter Saturn Transpersonal planets
The Sun & the Moon cannot go retrograde, but they count as personal planets in astrology, although astronomically they are not planets.
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