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: A Biorythms analog computer-calendar is provided to display without computations the level of the physical, the emotional, and the intellectual biorythms of a human body. The level of the three biorythms appears on display in analog and digital forms for any dialed calendar date, if the computer-calendar is set initially with the individual's birth date. The analog elements used to register the three biorythm levels are drums attached to gears with a number of teeth equal or proportional to 23, 28 and 33, or to the period of the three biorythms respectively. A calendar arrangement is introduced to create a correlation between the displayed biorythm levels and the calendar date associated with them.

Abstract: A calculation device for family planning, particulary for pre-planning the sex of a child. The device has a guide plate having a number of parallel guides arranged one above the other, and a cover plate which permits viewing of the guides. A number of slides for insertion into the guides are divided into sufficient divisions to accommodate the days of at least two successive months. An additional guide has a reference point and a window in the cover plate at a distance of fifteen such daily divisions from the reference point in the decreasing direction of the daily sequence. Two marker slides extend transversely over the guides and are slidable on the guide plate and cover plate assembly. The lower marker slide with reference to the daily sequence has two windows separated by two daily divisions and each being the width of one daily division. The upper marker slide has one window the width of one daily division.

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 rectangular member having indicia representing the calendar dates for the days of given months positioned in three separate columns on the member and indicator-index columns aligned and positioned adjacent each of the separate columns on the member. When the calendar date corresponding to the day of the onset of the menses is known, the indicator-index columns indicate the calendar dates for an eight day interval starting ten days after the indexed date to provide the time interval during which ovulation should occur and thus the days on which the probability of conception are maximized.

Abstract: A device for continuously and automatically graphically displaying an individual's biorhythm functions. The device comprises a generally cubicle enclosure in which a plurality of endless loops are rotatably disposed. Separate, preferably translucent loops provided to indicate the physical, emotional, and intellectual biorhythm functions are marked with a sinusoidal waveform corresponding to the particular biorhythm function displayed. The loops over-lie each other throughout a substantial portion of their length to provide a composite graphical biorhythm display which is visible through an illuminated viewing area provided at the front of the device. An internal motor is provided to continuously drive suspension spools on which the loops are mounted.

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: A biorhythmic slide rule which includes three separate movable slides wherein each slide includes different biorhythmic indicia. The slides are positionable in an overlying relationship with the indicia of all three of the slides being observable permitting a coordinated assemblage of the indica.

Abstract: A biorhythm calculator comprising at least two members, a rhythm scale member and a key scale member. The rhythm scale member has a major surface having a biorhythm cycle thereon, the cycle being identified by numbers of the days of the cycle, with the numbers being divided into at least three groups corresponding to high, low and critical periods of the cycle. The key scale member has a major surface parallel to the major surface of the rhythm scale member with such surface having figures indicating biorhythm positional relationship for the biorhythm cycle. The rhythm scale member and key scale member are moveable relative to one another so that the key scale figures can be compared to the periods of the cycle to determine which of these figures correspond to the specific periods of the cycle. Preferably, there are three rhythm scale members, each corresponding to a respective biorhythm cycle, and three key scale members, one for each respective rhythm scale member.

Abstract: A calculator for use in planning the orderly production of swine throughout a calendar year. The calculator includes a base and a disc rotatably mounted on the base. A circular scale is formed on the base around the outer edge of the disc. This circular scale has 365 equally spaced marks numbered in sequence around the scale. A second circular scale is formed on the outer edges of the disc and it has indicia indicating the months of the year with each month having indicia indicating the days of the month. The sequence of the indicia on the disc scale run in the opposite direction of rotation to the sequence of the indicia on the base scale. An alignment indicator is provided overlying the scales and aligned with the indicia number 1 on the base scale. A series of spaced, circumferentially extending bands are superimposed on the indicia of the base scale.

Abstract: The 23 day physical biorhythmic cycle, 28 day sensitive biorhythmic cycle, and 33 day intellectual biorhythmic cycle are commonly plotted in phase relationship with each other from a point where they commonly start on the neutral axis representing birth through 100 years in 4 year groupings, with adjacent 4 year groupings being shifted 1 day corresponding to the presence of a leap year in each 4 year grouping. The chart containing the plots is provided with lines indicating day intervals and indicia representing year intervals consecutively from the beginning day of birth. A curve that is a composite of the three biorhythmic curves is vertically aligned and spaced adjacently throughout the chart.