The embryo, maleness and/or the gamete of femaleness, the fertilized egg mother cell, one which is selected or the housing which contains the plural elements (11) it includes from the unfertilized egg, and the group which includes those combinations, being the instrument inside the collection possible uterus, the housing (11) it could provide the wall which was made with the organism compatibility material, it discloses the instrument inside the uterus. The housing (11) with it makes medium inside the uterus to the wall put, in cell contact state, the perforation which is the size which is sufficient in order at the same time among those to maintain the element (12 and 12 ) it can provide the line. The instrument of this invention, the embryo, maleness and/or the gamete of femaleness, the fertilized egg mother cell, one which is selected or the plural elements only loading has the system in order to remove from the unfertilized egg, and the group which consists of those combinations.胚、雄性および/または雌性の配偶子、受精卵母細胞、未受精卵、ならびにそれらの組合せを含む群より選択される1つまたは複数の要素を含有するハウジング(11)を含む、回収可能な子宮内器具であって、ハウジング(11)に生体適合性材料で作られた壁が設けられた、子宮内器具を開示する。壁には、子宮内媒質をハウジング(11)と細胞接触状態にさせ、かつ要素をその中に保つために十分なサイズである穿孔(12, 12)の列が設けられる。本発明の器具は、胚、雄性および/または雌性の配偶子、受精卵母細胞、未受精卵、ならびにそれらの組合せからなる群より選択される1つまたは複数の要素を装填しかつ取り出すためのシステムを備える。