Abstract: A fertility period calculator especially suited for third world countries, non-complex in operation, having two rotatable disks that require identification of numerals representing the days of the month and the average number of days in the user's menstrual cycle.

Abstract: A new type of bioclock calculating device for the human body comprising a ring, a set of discs and some accessories. They are marked with data graduation, age graduation and curves showing the cycles of physical, emotional and intellectual (PEI) rhythms. When superimposed eccentrically set into planetary revolutions, the discs will provide instant information about an individual's PEI rhythms on any day in any year and show the continual distribution of the curves over many years. It may also be used for a comparative study of PEI rhythms between two persons.

Abstract: A calculator used for displaying menstrual cycle synchronization of donors and recipients during embryo transfer procedures includes first, second and third members aligned with one another. In accordance with a preferred embodiment, the first member is a disc having the days of the menstrual cycle of the recipient thereon; the second member is a disc having dates of the monthly calendar thereon, and the third member is a disc having the days of the donor's menstrual cycle thereon. By aligning a window in the third disc with the seventeenth through nineteenth day of the recipient's menstrual cycle as displayed on the first disc, the days of the donor's cycle are substantially fixed.

Abstract: There is disclosed a calculator adapted to determine optimum fertility time periods for a female, formed by a first scale divided into 365 equal units, each unit assigned a day for each month of a full calendar year, a second scale positioned in operative relation to the first scale, the second scale including a first information segment formed by a series of 15 equal units, each unit representing a day in a menstrual cycle and ranging between 20 such days in a cycle and 35 days in a cycle, and a second information segment positioned a predetermined distance forward of the first information segment, the second information segment comprising the optimum fertility indicator segment and constructed by measuring a time period two days prior to and two days subsequent to the day of ovulation, the optimum fertility indicator segment constructed in the form of a box having a total of eight equal units from end to end, the center unit representing the point of ovulation, and the two markings measured therefrom each b

Abstract: There is disclosed a calculator adapted to determine optimum monthly fertility time periods of a female formed by a first scale divided into 365 equal units, each unit assigned a day and each month of a full calendar year, a second scale positioned in operative relation to the first scale, the second scale including a plurality of information segments, each of the information segments being sized to correspond with a different menstrual cycle length calculated by the time period between the first day of successive menstrual cycles and ranging between 23 cycle days and 35 cycle days, each of the information segments being spaced from the next adjacent information segment by a spacer segment, each of the spacer segments being of equal size, and each information segment further provided with an optimum fertility indicator segment sized in accordance with a time period equal to two days prior and two days following ovulation, whereby the manipulation of the second scale by placing the indicator indicating the fir

Abstract: A convenient, easy-to-use calculator computes a person's proper bra and cup size given a knowledge of that person's chest, overbust, and band measurements. The calculator comprises a circular slide rule of three superimposed disks, the intermediate disk being of larger diameter than the upper disk and the lower disk being of larger diameter than the intermediate disk. The three disks are mounted for relative rotation by means of an axially disposed pivot, pin, rivet, or other means transfixing the disks for ease of rotation about their centers. Scalar indicia at the periphery of the disks represent body measurements required for the determination of proper bra size. Proper bra and cup size are viewable through circular indexes when a person's chest and overbust measurements are aligned on the two outermost peripheral scales and the person's underbust or band measurement is aligned with a fixed index on the intermediate disk.

Abstract: A calculating device is provided to aid in predicting the periods of fertility and non-fertility during a menstrual cycle of a user. The device includes a first disc having indicia thereon representing the calender days of the present month and the next month, a second disc having indicia thereon indicating the length of and the days in a normal menstrual cycle of the user, and a base plate having markers thereon which, when placed in proper registry with the indicia on the two discs, indicate which calendar days during the present menstrual cycle the user is fertile. In a second embodiment an additional disc is provided for indicating days in the shortest period of a user who has irregular menstrual cycles. This additional disc, when placed in registry with the other discs, indicates an expanded period of fertility for the user.

Abstract: A human reproduction indexing device for indicating the calendar dates for days of a menstrual cycle on which the probability of conception is the greatest includes a generally circular base member having indicia representing the calendar dates for the days of a given month disposed around the periphery thereof, and an index member rotatably secured to the base member and having an index and an indicator disposed thereon and configured so that when the index is aligned with the calendar date corresponding to the day of the onset of the menses, the indicator is positioned to indicate the calendar dates for a seven day interval starting ten days after the indexed date thereby indicating the time interval during which ovulation should occur and thus the days on which the probability of conception are the greatest.

Abstract: Several transparent elements showing periodically-varying curves and a transparent element showing a date scale are superposed over each other and a ground element which shows a number of year scales of different length, subdivided from 0 to 100 years. The transparent elements are to be adjusted in respect to their position to said year scales according to a reference date and a desired reading date. The correct position of all curves and their inter-relationship are immediately visible i.e. without any foregoing use of the known mathematical tabulations which are standard e.g. in the biological rhythm field.