The female breasts vary so much in shape and size
that I believe that there is no hard and fast rule on how they
should look in your picture. I'm sure when we all first
started attempting to draw our first nude we stuck two circles at the top of
our females chest, stuck a small circle in the middle for the nipple
area and said,
right that's the breasts. Below are two examples, example two being
the more feminine interpretation of the breast with the nipple
positioned more realistically as due to gravity they tend to point
down and slightly out.
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ACHD

The key again to getting this right is first to decide how you
want them to look on the body, the size, be it large or small and
then of course practice their shape and overall appearance
constantly until you are happy with the finished look.
(See also) I tried to
always imagine roughly a right angle when positioning the breasts.
It is really in the minds eye how they appear on your female, just
try to make them look believable. If they work for you then chances
are they will work for everyone else.
Obviously you won't always be drawing your female front on so
below are some more examples of the more realistic positioning of
the breast in relation to the rest of the body. The breast is
connected to muscle so when the arms or body move the breast moves
accordingly so try to allow for the movement when drawing them. For
example when the arms are raised the breast will lift slightly. I practised these
for ages so don't be put off.

Copyright © 2009
ACHD
Here is front view showing the body straight and slightly
twisted. In this view the shoulders are back.

Copyright © 2009
ACHD
Copyright © 2009
ACHD
Here is a side profile showing the body straight and slightly
twisted.

This view shows the arms raised viewed from the front and rear.
Again when shaping the breast In profile or if my female is
slightly twisting I imagine a right angle where I want to position
the breast and then add the shape of the breast. I make sure the top line
is longer than the bottom and curve both lines to form the shape. It is
important that you make the top line longer or your breast may
look out of proportion. Obviously if the pose needs this to be
different then again use your eyes to decide what looks best.
(See also)
Back.
Breast
position.