You were trained to be bred by Master...

Once your bodies had been augmented for Master and you had been retrained to Mistress Jade's satisfaction, Yoshino and you had been allowed to train at the harem's "finishing school". Other girls participated in different classes. Most of them were other lower harem concubines. Their age and experience hinted that they were likely only a few years ahead of you in training. Most of these girls were taking the "classes" as a refresher. Some were friendly, but you could tell that they had been instructed to keep you at a social distance. As the lowest members of the harem, Yoshino and you still shared a room and you were allowed minimal clothing (a g-string, nipple jewelry, wrist restraints, 6 inch heels, and neck collar). Mistress Jade still carefully monitored the two of you, but a few nights a week you were allowed to associate with a few of the lower harem girls.

Professor Jennifer had been very difficult to read. Her medical background had been apparent at first meeting her. She wore a white doctor's lab coat which was buttoned to taper flatteringly at her waist and left buttoned at the top to show off the ample cleavage spilling from her blouse beneath. She had thick black rimmed glasses and long brown bangs which failed to hide her beautiful blue eyes. Her large vocabulary had made her difficult to connect with, but did establish her credibility to teach "Breeding 101".

The first few weeks of Breeding 101 were spent learning everything you needed to understand about your reproductive system. Most of the information you had already known from your education growing up, but a lot of the information was new due to the unique situation on the planet or from the new augments implanted within your body.

All of the girls in the class had been shocked to find out that you and Yoshino were both heredisfactorem. Both of you were among the rare women who were capable of producing a male heir when bred by a male. Almost all other women were incapable of producing an ovum with the ability to gestate a stable Y-chromosome. This condition due to the planet's bad terraforming almost two thousand years ago. Your condition as an "heir maker" was so rare that you two were the only females within Master's harem capable of bearing him a son.

The class was reminded of the basics of the female reproductive system. Your menstrual cycle would operate as normal on the planet. As a concubine, you were instructed on your duties were to prepare your body to be optimized for each of the four phases of your cycle. Your hormone levels would be measured and tracked at the start of each day. Your diet, bodily preparation, and even schedule with Master would be fine tuned to maximize the likelihood that you would produce a healthy child for Master.

Your augments also had important impacts to your reproductive system. First, your augments had been designed to instill an uncontrollable need to be bred. Your clit had three times the amount of nerve endings and the remote controlled clitoral implant would increase the blood flow and add vibrations on Master's command. You would be needing whenever he desired. Your breasts had been primarily increased for Master's pleasure and entertainment. The cloned fat cells were used to dramatically increased the size of your breasts beyond what your tiny frame could have supported naturally. Increased milk ducts and lobules were cloned to increase the perkiness, but would also increase the milk flow but it was unlikely you would ever see your infants in the future. Increased nipple sensitivity would make latching difficult anyway. Your infant would be moved to a communal nursery with milk produced by the "milker" class after a few weeks. Preventing breast feeding would ensure your body would be ready for breeding faster.

Master's anatomy was far beyond that of a normal man. You had already seen the massive organ on the night of your collaring ceremony, but you were instructed on it more fully. The Emperor, Master's leader, had made sure that all of his most senior lieutenants were properly augmented to ensure large healthy populations by those loyal to him within his empire. Master's dick was massive. The shaft was a foot long and was over two inches in girth. Additional veins had been added to increase blood flow and ensure a rock hard erection.

Within his stretched scrotum were two massive orange-sized testicles! They were capable of producing over 20 times the amount of seed as a normal man. His refractory period was non existent. He would be able to pump sperm into any waiting pussy, mouth, or ass available at any time he desired. This was critical for supporting such a massive harem, but did not come without problems. Master's stride was wide and awkward to accommodate these grand testicles between his legs.

Unfortunately for you, your vaginal canal had been dramatically tightened for Master's pleasure. Vaginal birth would never be impossible, but you were assured the laser c-sections left no scars. This tightening would make coupling difficult and require hands on training to learn to accommodate him. Each woman was slightly different, but hormones, arousal level, and vaginal training could assist a woman to accommodate a massive member to it's full length. The last few weeks of the class were spent learning to adjust to increasingly sized objects within your poor pussy!

You were warned you would likely need future training as additional tightening procedures were often "earned" if you rose higher within the harem. That explained why you would see more senior girls mixed into your training class.